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
推荐题目
Please cut __ the banana __ small pieces.
#49846
A
up; to
B
up; into
C
off to
D
off into
My mother is strict both _____ me and ____ her work. 
#47299
A
with; with
B
with; in
C
in; in
D
in; with