问题

You must be careful when ___ on the highway.
A:you driving
B:are driving
C:driving
D:you were driving
B:are driving
C:driving
D:you were driving
正确答案是:
同类题型
Everybody in the village likes Jack because he is good at telling and _____ jokes. [ ]
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Our school will hold a sports meet next week. I’d like to take part in the girls’ _______ race.
Tony, can you play_________ piano—No, But I can play______ chess.
e my friend Tom’s friendship very much, but_______ I dislike his selfishness