It is very hot today. What about _____ swimming?
#50186
A
go
B
goes
C
going
D
went
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---Don't skate on the lake! ---Why not? Isn't it thick enough___________?
#48601
A
to skate
B
skating on
C
skating
D
to skate on
Tom misses his brother very much and he is looking forward ____ him. 
#48593
A
to hear from
B
hearing from
C
to hearing from
D
heard from
They tell us some ways _________English well.
#49212
A
teach
B
learning
C
to learn
D
teaching
You need ________ fit.
#49609
A
exercise keeping
B
to exercise to keep
C
exercising keeping
D
to exercise keeping