1.I just don't understand______that prevents so many Americans from being as happy as one might expect.
A.why it does B.what it does C.what it is D.why it is
(请翻译这一题!)
2.It was in the lab_____was taken charge of by Professor Zhang____they did the experiment.
A.where;that B.which;where C.that;where D.which;that
3.My cousin,little George,is____a fool.He did very will in all his subjects.
A.anything but B.something of C.nothing but D.something like
4.The boy_____in bed,with his eyes____on the ceiling when I came in.
A.lied;fixed B.lied;fixing C.was lying;fixing D.was lying;fixed
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