( ) 39. According to the passage, which of the following may indicate the symptom of bowel cancer?


(A) Coughing.

(B) Back pain.

(C) Loss of appetite.

(D) Blood in body waste.

( ) 40. What is the main purpose of the second paragraph? (A) Medicines for bowel cancer. (B) Prevention of bowel cancer. (C) Abdomen and bowel cancer. (D) Screening for bowel cancer. 第 4 頁 / 共 6 頁 The Christmas gifts have been delivered, and Secret Santa’s jobs are done. Now, the work begins for Optoro. Optoro is a start-up company, and it aims to reduce the environmental costs of another great holiday tradition: returns. Americans returned $260 billion in merchandise last year according to the National Retail Federation. And a quarter of that was during the holiday season. As e-commerce sales surge and free return shipping becomes the norm, shoppers return even more. However, little known to shoppers is that a majority of returned items never make it back to retailers’ shelves. Instead, many of them end up in landfills. According to some estimates, as much as two million tons of returned items are thrown away each year, enough to fill over 200,000 garbage trucks. Returns are not just a big loss for retailers. They are a big and growing environmental burden. Growing together with the rise of online sales, Optoro is becoming a key player in the “reverse logistics” industry handling returns in the United States. And it is attracting investors’ attention. Optoro declined to disclose sales, but said it processed about 10 million returned items a year and has raised $80 million in funding from Silicon Valley investors.

( ) 41. What is the passage mainly about? (A) Increasing e-commerce sales and free returns. (B) A company that dealt with returned gifts. (C) How people return gifts after holidays. (D) Why Americans returned their gift.

( ) 42. Which of the following is NOT true regarding Optoro? (A) It is a new company. (B) It announces its sales every year. (C) It is capable of raising money from investors. (D) It plays an important role in taking care of returned products.

( ) 43. Which of the following is NOT true according to the passage? (A) Shoppers are fully aware of where their returns are treated. (B) Gift returns have something to do with e-commerce. (C) Returns have become another holiday tradition. (D) Optoro grows together with e-commerce.

( ) 44. What does the word “They” in line 9 refer to? (A) Landfills. (B) Shoppers. (C) Returns. (D) Trucks.

( ) 45. What does the phrase “reverse logistics” in the 2nd paragraph most likely mean? (A) Operations related to the reuse of products. (B) Action that attracts investors’ attention. (C) A growing environmental burden. (D) The rise of online sales. An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without a human pilot aboard. The flight of UAVs may be controlled by a given degree of remote control from an operator. UAVs are often preferred for missions that are too dull, dirty or dangerous for manned aircraft. They have and are mostly found in special operation applications. In the United States, for example, government agencies use UAVs to patrol the nation’s borders, watch property, and locate criminals. Drones are also used to gather weather information from the atmosphere. According to scientists, the drones could help weather experts improve their predictions. Meteorologists say their 第5頁 / 共6頁 weather forecasts would be more accurate if they had information from many parts of the atmosphere. Nowadays, UAVs are increasingly used in recreational purposes. First of all, they must be operated in accordance with a community-based set of safety guidelines. Secondly, the aircraft is limited to 55 pounds unless otherwise certified. Thirdly, the aircraft is operated in a manner that does not interfere with and gives way to any manned aircraft. Lastly, when flown within 5 miles of an airport, the operator of the UAV provides the airport air traffic control tower with prior notice of the operation.

( ) 46. What does the passage mainly describe? (A) How to fly drones. (B) Drones and their uses. (C) Different names of drones. (D) Drones and weather changes.

( ) 47. Regarding the uses of drones, which of the following is NOT mentioned in the passage? (A) Collecting weather information (B) Recreational purposes. (C) Controlling pests. (D) Border patrols.

( ) 48. Which of the following is NOT true when drones are used as a pastime? (A) Operators should follow safety guidelines. (B) Drones should yield to manned aircraft. (C) The weight of drones is usually limited. (D) Drones can fly five miles only.

( ) 49. In line 4 of the passage, what does the word “They” refer to? (A) Dirty missions. (B) Manned aircrafts. (C) Nation’s borders. (D) Unmanned aerial vehicles.

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