单项选择题

The teacher rather than the students ______ the mistakes.

A．is responsible for
B．are responsible for
C．is responsible to
D．are responsible to
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单项选择题
Susan' s mother is very particular ______ the plates she uses for the party.
A．for
B．about
C．to
D．in
单项选择题
The president ______ a rise in salary for ages, but nothing has happened yet.
A．promised
B．is promised
C．has been promising
D．is promising
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