The secretary will contact you _____.
A. for three days
B. in three days
C. about three days
D. at three days
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Would you show me____ use this machine?
A. how to
B. how I
C. whatto
D. what I
Have you got ____ letters I sent you?
A. the
B. /
C. a
D. an
Neveryourlaptop near heat.
A. leave
B. leaving
C. to leave
D. leaves
People usually plant trees ________ April in Beijing.
A. on
B. in
C. at
D. to
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