单项选择题

After his long absence from school he found it difficult to ______ up with the rest of his class.

A．catch
B．take
C．make
D．work
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单项选择题
You should ______ at least three days for the journey.
A．expect
B．permit
C．accept
D．allow
单项选择题
The customs officer asked me if I had anything to ______
A．say
B．state
C．explain
D．declare
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