单项选择题

Tell me since when he ______ in your school.

A．taught
B．has taught
C．teaches
D．had taught
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单项选择题
I haven't seen him for quite a long time, but his parents ______ him sometimes.
A．still saw
B．still see
C．have still seen
D．has still seen
单项选择题
It ______ nearly every, day here this mouth.
A．rains
B．is raining
C．has rained
D．has been rained
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