3. Some scientists believe that rain forests cool the atmosphere by ______ the sun’s heat. (A) absorbing (B) enhancing (C) isolating (D) observing

13. It is presumed that Taiwan’s original ______ arrived under the power of the southwest monsoon and oceanic current that affects the area. Consequently, scholars have long believed that Taiwan’s indigenous people arrived from the south at different times from different places. (A) contestants (B) astronomers (C) recipients (D) inhabitants