单项选择题

The situation today is obviously quite different from ______ it was only 50 years ago.

A．which
B．what
C．when
D．such
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单项选择题
John had been working hard and ______.
A．so had his brother
B．so his brother had
C．so was his brother
D．so his brother did
单项选择题
______ being late made the boss angry.
A．Him
B．His
C．He's
D．For him
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