21. What ________ relief! It almost took us five years to pay back all the money we borrowed from the bank. Now we are out of ________ debt.
A. a; 不填 B. a; the C. the; a D. 不填；不填
22. My son ____ his clock when I went to get the cup I ____ in his study.
A. was winding up; had left B. wound up; had forgotten
C. had wound; left D. was winding; forgot
23. Only when we have _____ all the factors involved can we decide when would be the best time to start.
A. valued B. evaluated C. thought D. weighed
24. ----What kind of people do you need for the position?
----_____ with a good command of English.
