Ifwehadtakensucheffectivemeasu

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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Before he volunteered to direct traffic, Timoteo _________ lots of jobs.

A．had had	B．has
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—That _________ easy!

A．mustn’t be	B．mustn’t have been
C．can’t have been	D．wasn’t

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A．alone; variable	B．lonely; various
C．alone; various	D．lonely; variable

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A．settled	B．settling
C．to settle	D．being settled

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A．Although	B．However
C．Whatever	D．Though

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