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SOME SCIENTISTS SPEND MOST OF THEIR LIVES ………AT RO...
SOME SCIENTISTS SPEND MOST OF THEIR LIVES ………AT ROCKS.A. LOOKING B....
100 CAU TRAC NGHIEM TIENG ANH
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27.
Some scientists spend most of their lives ………at rocks.a. looking b. look c. to look d. looked(spend sometime doing something?)
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27.
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100 CAU TRAC NGHIEM TIENG ANH