【題目】It is nearly 50 years ______ the People’s Republic of China was founded.
A. after B. before
C. when D. since
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【題目】Don’t be ____by products promising to make you lose weight quickly.
A. taken off B. taken off
C. taken away D. taken in
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【題目】If you do fall out of the boat, your lifejacket will help you to ______ until we can fish you out.
A. stand up B. keep up
C. follow up D. stay up
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【題目】Recently some hospitals in China have adopted ______ they call a robot-doctor, ______ will be used to operate on patients with more accuracy.
A. what; that B. that; which
C. what; which D. which; what
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【題目】______ the sun rises, all the stars in the sky disappear.
A. The moment B. Before
C. Till D. For
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