Computersinofficesandhomessinc

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Computers ____ in offices and homes since 1970s.

A．have been used

B．had been used

C．was used

D．has been used

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Those successful deaf dancers think that dancing is an activity ___ ___ sight matters more than hearing.

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It is reported that two schools, ___ ___ are being built in my hometown, will open next year.

A．they both	B．which both
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A．when	B．during which
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A．that	B．there
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