It is not easy to learn English well, but if you ____.You will succeed in the end.
#82937
A
hang about
B
hang on
C
hang onto
D
hang up
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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