单项选择题

—Have you __________ been to Beijing—No, never.

A． just
B． ever
C． yet
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单项选择题
__________ of us has much time. We __________ have much homework to do.
A． Both... both
B． Both... neither
C． Neither... both
单项选择题
You can't do it and I can't do it __________.
A． also
B． either
C． neither
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