Ifwehadtakensucheffectivemeasu

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If we had taken such effective measures much earlier, the river so seriously now.

A．is not polluted	B．would not be polluted
C．had not been polluted	D．would not have been polluted

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The writer and singer ______ here.

A．is

B．are

C．were

D．do

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. No teacher and no student ______．

A．are admitted	B．is admitted
C．are admitting	D．is admitting

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Nobody ______ seen the film. It’s a pity.

A．but Tom and Jack have	B．except Tom and Jack have
C．but my friends has	D．but I have

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There _____ a dictionary and several books on the desk.

A．are

B．must

C．have been

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What she says and does _____ nothing to do with me.

A．was

B．were

C．has

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