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【单选题】

When we have a class meeting, we often end up _______.
[ ]

A.
to sing
B.
sang
C.
singing
D.
are singing
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参考答案:
参考解析:
.
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举一反三

【单选题】—How do you spell key?—_____.

A.
No, it's not a key
B.
K-E-Y
C.
It's my key
D.
Yes. K-E-Y