Watch out! The pile of boxes ________..
A. fall
B. is going to fall
C. will be falling
D. is falling
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He ______no sooner ______ the coat than he began to feel cold again.
A. had...taken off
B. has...taken off
C. takes... off
D. took...off
"Can I help you,sir?"---"Yes, I bought this radio here yesterday, but it ____work."
A. didn't
B. won't
C. can't
D. does't
统计表明,对自己家庭境况不满意的学生,其抱负水平比一般学生低。()
A. 对
B. 错
You may leave the classroom when you ________writing.
A. will finish
B. are finishing
C. finish
D. had finished