It took a long time for the effective use of natural gas ______.
#93382
A
making
B
being made
C
to make
D
to be made
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Everyone in this country should work hard and do what they can _____ against national smog.
#89465
A
fight
B
fought
C
fighting
D
to fight
Mike apologized for _______ to inform her of the change in the working plan.
#88613
A
his being not able
B
him not to be able
C
his not being able
D
him to be not able
His first book ___________ next months is based on a true story.
#93027
A
published
B
to be published
C
to published
D
being published
No matter how bright a talker you are, there are times when it is better ______ silent.
#91568
A
remain
B
be remaining
C
to remain
D
having remained