问题
选择题
. There is such an occasion ___________ we know lots of words, but we can’t choose a suitable one to express ourselves.
A．where
B．when
C．which
D．what
答案
答案：B
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. There is such an occasion ___________ we know lots of words, but we can’t choose a suitable one to express ourselves.
A．where
B．when
C．which
D．what
答案：B