单项选择题

By the end of last term, we（）ten units.

A． learned
B． had learned
C． has learned
D． learns

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It is known to all（）discovered the America continent.

A.how
C.who
B.when
D.why
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Should she come here, we（）about this with him.

A． would have talked
B． would talk
C． will have talked
D． talked
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