1、______she realized it was too late to go home.
A.No sooner it grew dark than
B.Hardly did it grow dark that
C.Scarcely had it grown dark than
D.It was not until dark that
2、When I try to understand______that prevents so many American from being as happy as one might expect,it seems to me that there are two causes.
A.why it does
B.what it does
C.what it is
D.why it is
答案及解析:
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