We had an anxious couple of weeks, ____ for the results of the experiment.
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A
wait
B
to be waiting
C
waited
D
waiting
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The place is worth _________.  
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A
pay a visit
B
paying a visit to
C
paying a visit
D
pay a visit to
 _____ the meeting himself gave them a great deal of encouragement.
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A
The president will attend
B
The president to attend
C
The president who attending
D
The president's attending
. _________ the temperature might drop, coal was prepared for warming.
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A
To consider
B
Considered
C
Considering
D
To be considered