It _______ John. He has gone to Beijing.
A. must be
B. mustn’t be
C. can be
D. can’t be
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They _______ 600 trees before last Thursday.
A. had planted
B. have planted
C. planted
D. were planting
We _______ about 2 thousand English words by the end of last term.
A. have learned
B. learned
C. had learned
D. were learning
My brother_______ while he ________ his bicycle .
A. fell, was riding
B. fell, were riding
C. had fallen, rode
D. falls, was riding
----Miss Lin_______ my deskmate with her lessons when I left school.----She is really a nice teacher.
A. helps
B. is helping
C. was helping
D. help
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