问题描述：
(1)--Was it under the tree ----- you were away talking to a frirnd?
-- Sure.But when I get back there,the bike was gone.
(2) Was it under the tree ----- you put your bike when you were away talking to a friend?
A that B where C which D while
怎样选?请说明选择原因?
-- Sure.But when I get back there,the bike was gone.
(2) Was it under the tree ----- you put your bike when you were away talking to a friend?
A that B where C which D while
怎样选?请说明选择原因?
问题解答：
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