问题

Is your Uncle Tom a soldier— No, but he once ______ in the army for 4 years.
A:served
B:is serving
C:has served
D:had served;
B:is serving
C:has served
D:had served;
正确答案是:
同类题型
read the Frog by Moyan,haven’t you—Yes,I_______second time and I got a betterunderstanding
Would you like to go ______for a vacation —Yes ,I’d love to .
This is ______ book. They like it very much.
Happier people are more likely to volunteer, to ______ money, to help others, and to be friendly.
What are you busy with? — The conference in our city next week