单项选择题

______ did I have any idea what a real man-made satellite looks like.

A．Until quite recently
B．It was quite recently
C．Not was it quite recently
D．Not until quite recently
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单项选择题
You will never guess whom I ______ on the street yesterday.
A．ran over
B．ran out of
C．ran into
D．ran up to
单项选择题
Susan is not very intelligent, ______ work very hard.
A．not does she
B．or does she
C．either does she
D．neither does she
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