16. 棒球早已成為人們生活的一部分，可說是台灣的「國球」。 (A) Baseball was an integral part of people’s life and may become the national sport of Taiwan. (B) Baseball has been an integral part of people’s life, which is the national sport of Taiwan. (C) Baseball, an integral part of people’s life long ago, so-called the national sport of Taiwan. (D) Baseball, long an integral part of people’s life, is considered the national sport of Taiwan.

19. (A) Already in the Paleolithic Age, tens of thousands of years ago, the ancient Chinese knew how to make simple tools and ornaments from animal bones and tusks. (B) Already in the Paleolithic Age, millions of years ago, the ancient Chinese knew how to make simple tools and ornaments from animal bones and tusks. (C) By the Paleolithic Age, tens of thousands of years ago, the ancient Chinese were known how to make simple tools and ornaments from animal bones and tusks. (D) By the Paleolithic Age, millions of years ago, the ancient Chinese were known to have been making simple tools and ornaments from animal bones and tusks.

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