--What’s this__________ English?--It’s a pen．
#49859
A
to
B
in
C
on
D
at
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I often go to sleep ________10:00 p.m. ________7:00 a.m.．
#49545
A
at, at
B
at, and
C
between, and
D
from, to
--It’s clever _____ you to help me work out this difficult maths problem. Thanks.--- You are welcome. Now it’s easier ______ you to understand it.
#47375
A
of; of
B
of; for
C
for; of
D
for; for