He decided not to say anything at the meeting unless_________.
#90425
A
asking to
B
to ask to
C
asked to
D
ask to
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They would not allow him ________ across the enemy line. 
#98787
A
to risk going
B
risking to go
C
for risk to go世间
D
risk going
He observed a stranger _______ around the store at 12 p.m. last night.
#97199
A
to hang
B
hang
C
hanging
D
to be hanging
Several months later, he found his deskmate very difficult _______.
#96570
A
to get along with
B
getting along with
C
to get along
D
to be gotten along with