He started to walk faster and the children had to run to ________him.
#72870
A
come up with
B
catch up with
C
keep up with
D
put up with
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The number of  the workers in this factory     300, that is to say, it       20%.
#69827
A
has increased by; has increased to
B
have increased to; have increased by
C
has increased to; has increased by
D
have increased by; have increased to