单项选择题

the population is too large, we have to take measures to control the birth rate.

A．Although
B．Since
C．If
D．Until
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No one, except his two best friends, ______ where he is.
A．know
B．knows
C．to know
D．knowing
单项选择题
He said, I ______ a lot of new poems by the end of last year.
A．h ad already learnt
B．have already learnt
C．would have already learnt
D．already learnt
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