_______the past two months he has been busy with his school work.
A. For
B. On
C. Since
D. At
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________last Saturday, we had had two football matches with Class Two.
A. For
B. /
C. By
During
We will be in Nanjing _____ Tuesday ______Thursday.
A. on/ through
B. on/to
C. from/to
D. on./till
Mr Black will visit our new school building ______ two days.
A. before
B. after
C. at
D. in
_______ theend of last spring Wang Hai joined the army _______ the end.
At/at
By/in
C. In /at
D. At /in