If the sun did not _________________heat, the temperature of the earth would fall almost to absolute zero.
A. give up
B. give in
C. give off
D. give way to
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He didn't ______________ the first bus to work, so he had to take a taxi.
A. catch on
B. catch at
C. catch on with
D. catch up with
That day he had been ______________every since he got up and by 6 o'clock in the afternoon he was tired out.
A. on time
B. on strike
C. on the air
D. on the run
We were fighting to ______________this recovery and keep the economy growing by all means possible.
A. drive in
B. grow up
C. break up
D. speed up
We are probably ____________ hearing about global warming.
A. tiring of
B. tiring with
C. tired of
D. tired with