11.In the United States, the foreign policy is decided by the ________ government, not by each state.
12.He works in our university as a visiting _______, not as a formal faculty member.
13.When you fill in the application form, please use your _______ address so that we can contact you easily later.
14.John _______ to be a polite man. But in fact he is very rude.
15.We can not trust him any more because he often ________ his duty.
16.In order to increase our output, we need to import more production _______.
17.When a spacecraft travels, one of the major problems is reentry into the Earth’s _______.
18.This river forms a natural _______ between China and Korea.
19.She is already 16years old. But she _______as if she were still a little girl.
20.We are _______ at the rapid progress Mark has made in this semester.
11.A 12.A 13.B 14.D 15.A
16.B 17.D 18.D 19.A 20.C