26．Evenifthereisnoscientificpr

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更新 2022-09-03
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26．Even if there is no scientific proof yet ______ secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk．

A．which

B．that

C．when

D．Where

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She ____ on her homework in her study now .

A．must work

B．can work

C．must have worked

D．must be working

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Much attention ____ pronunciation if you want to speak English well .

A．should pay to

B．must be paid

C．should be paid to

D．will be taken of

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He must be in the park , ____ ?

A．must not he

B．isn''t be

C．needn''t he

D．doesn''t he

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— Shall I tell Tom about it ?
— No , you ____ . I''ve told him already .

A．needn''t

B．wouldn''t

C．mustn''t

D．shouldn''t

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There used to be a church in the past , ____ ?

A．isn''t there

B．didn''t there

C．usen''t it

D．used not it

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