单项选择题
Without computers，we ______ the tremendous medical advancement in the last few decades.
A．would not make
B．will not have made
C．could not make
D．couldn’t have made
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单项选择题
French is not his mother ______ but he can speak it excellently.
A．tongue
B．talk
C．speak
D．speech
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单项选择题
_______ the weather forecast it will rain heavily late this morning.
A．On account of
B．Because of
C．According to
D．Due to
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