问题

I decided ________ at least once a week.
A:exercise
B:exercised
C:to exercise
D:exercising;
B:exercised
C:to exercise
D:exercising;
正确答案是:
同类题型
One of our rules is that every student ____ wear school uniform while at school.
How many birds can you see in the trees–I can see ________ birds in the trees.
Has he found ______ better job— No. He planned to learn ____ second foreign language.
Judy failed in this exam, since she is very strict ____ herself. She is sad.