[ Passive Voice ]
Children must be _____ but not _____ .
A. see – hear
B. seen – heard
C. saw – hear

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A. went
B. goes
C. has gone
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The restaurant …..at 8.00 a.m. and …. at 10.00 p.m.
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From a distance, we could see several old houses standing ____________ along the street.
A. empty
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