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—I have never been to the Great wall. —If you have an opportunity _______ there, you must take it.
#48916
A
to go
B
to going
C
going
D
go
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How kind you are!You always do what you can______me.
#49506
A
help
B
helping
C
to help
D
helps
Remember       off the lights when you leave the classroom.
#49459
A
turn
B
to turn
C
turning
D
turned
 Do you like _____?
#50224
A
going swiming
B
go swim
C
go swimming
D
going swimming
Most students hope _______well in their study.
#50687
A
doing
B
do
C
to do
D
does
I’m too busy _______ my homework _______ walk my dog every day.
#51203
A
to do; to
B
doing; to
C
to do; /
D
doing; /