单项选择题

A．loose
B．dotted
C．attached
D．tight
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单项选择题
What program has been initiated
A．Spraying chemicals.
B．Building a high dam.
C．Raising funds in western countries.
D．Appealing for more international aid.
单项选择题
A．so early asB．earlier thanC．early whenD．as early as
A．so early as
B．earlier than
C．early when
D．as early as
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