单项选择题

You should do（）investigations on this matter.

A．farther
B．much father
C．more father
D．further

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单项选择题
Two people had met the General before, but（）recognized him.

A．either
B．neither
C．any
D．some
单项选择题
Only by shouting at tile top of his voice（）

A．was he able to make himself hear
B．he was able to make himself hear
C．he was able to make himself heard
D．was he able to make himself heard
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