问题
选择题
—Where was the boy taken away by the UFO?
—Oh, it was in the lake ______ he was swimming.[ ]
A. that
B. where
C. because
D. at which
答案
答案：B
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—Where was the boy taken away by the UFO?
—Oh, it was in the lake ______ he was swimming.[ ]
A. that
B. where
C. because
D. at which
答案：B