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They put their books____to make the library clean and tidy.
#46653
A
under the chair
B
on the floor
C
behind the door
D
in the bookcase
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It is very difficult      the little boy      carry the big box.
#48388
A
of; for
B
to; to
C
for; to
D
by; for
Sound travels ______ air ______ a speed of about 340 metres per second.
#47987
A
over; in
B
through; at
C
by; at
D
through; over
It’s selfish ________ him ________ the cakes with others.
#49473
A
for; to share
B
of; not share
C
of; to not share
D
of; not to share
---How do you go to school every day？---________.
#48241
A
By bikes
B
By bike
C
On bike
D
By a bike
There is going to be a wonderful party _______ the evening of October 1st, 2009.
#50201
A
in
B
on
C
at
D
for