That is the only way we can imagine ______ the waste of water in students’ bathroom.
#48567
A
stop
B
stopped
C
stopping
D
to stop
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Would you mind _________ in class? 
#50381
A
no talking
B
not talking
C
no talk
D
not talk
I don’t know _________ the problem.
#49541
A
how deal with
B
how to deal with
C
what to deal with
D
what do with
The boy is often seen _______ basketball after school.
#50874
A
play
B
to play
C
to playing
D
played