单项选择题

Linda has lost her wallet again. It is the second time this ______.

A．has happened
B．happened
C．happen
D．was happened
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单项选择题
It is no easy job to be a teacher. One has to be extremely patient ______the students.
A．at
B．about
C．on
D．with
单项选择题
All ______ for your good.
A．what I said was
B．what I said were
C．that I said were
D．that I said was
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