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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--- Is there any flowers _______ the tree.--- No. But there are many birds _________ it.
#48016
A
in, on
B
in, in
C
on, in
D
on, on
There is a big tree ______ the house.
#50720
A
in the front of
B
at the front of
C
in front
D
in front of