单项选择题

The fire was finally brought under control, but not ______ extensive damage had been caused.

A．before
B．since
C．agar
D．as
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单项选择题
A．have finalized a charter on their new relationship.B．still have differences in military and political issues.C．will hold a fifth round of talks in Luxembourg.D．made no progress in this round of talks.
A．have finalized a charter on their new relationship.
B．still have differences in military and political issues.
C．will hold a fifth round of talks in Luxembourg.
D．made no progress in this round of talks.
单项选择题
According to the passage, when are children first expected to study hard
A．Before 6 years of age.
B．Between 6 and 10.
C．After 10 years of age.
D．After 12 years of age.
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