Passage 2Questions 20 to 22 are based on the passage you have just heard.[音频]
A. To learn the chemical elements in the Ice Age for the last ten thousand years .
B. To learn the pattern of solar wind activity for the last ten thousand years .
C. To learn the composition of different trees for the last ten thousand years .
D. To learn what 's being happening on the sun 's surface for the last ten thousand years
查看答案
Questions 20 to 22 are based on the passage you have just heard.
A. The lifecycle of trees .
B. The number of trees .
C. The intensity of solar burning .
D. The quality of air .
Questions 20 to 22 are based on the passage you have just heard.
A. It affects the growth of trees .
B. It has been increasing since the Ice Age .
C. It is determined by the chemicals in the air .
D. It follows a certain cycle .
Passage 3 Questions23to25arebasedonthepassageyouhavejustheard.[音频]
A. Facial expression .
B. Gesture .
C. Movements of the body .
D. Non - verbal language .
Questions23to25arebasedonthepassageyouhavejustheard.
A. Because there is large number of vocabulary .
Because the non - verbal languages are not easy to understand .
C. Because the grammar is too complicated .
D. Because there is no language learning environment .
微信支付 
支付宝支付