单项选择题

______ Simon ______ Jack know what has happened.

A. Both... and...
B. Either... and...
C. Either... or...
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单项选择题
I don't like skating, and I do not enjoy skiing ______.
A. too
B. either
C. as well
单项选择题
China's sport stars Yao Ming and Liu Xiang ______ Goodwill Ambassadors(亲善大使)for Shanghai.
A. has been named
B. have been named
C. have named
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