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 (2011年南通一模)________there are living creatures in the outer space as those on Earth hasn’t been proved until now.

A.How                     B.When

C.Where                   D.Whether

解析:选D。考查名词性从句。句意:外太空是否存在像地球上一样的生物还不能确定。whether引导主语从句。

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 (2011年南通一模)—Where have you been all day?

—I________some former classmates and I couldn’t get back until it was dark.

A.have met                      B.met

C.would meet                  D.had met

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