单项选择题

China’’s hi-tech trade surplus has lasted for ________so tar.

A．4 months
B．7 months
C．4 years
D．7 years
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单项选择题
How many people were caught in the fire
A．6
B．5
C．4
D．7
单项选择题
A．excessiveB．extraC．additionalD．added
A．excessive
B．extra
C．additional
D．added
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