单项选择题

A．They often check their spelling.
B．They think carefully about the grammar.
C．They read the message several times before they send it.
D．They write the first thing that comes into their head.
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单项选择题
A．The middle of the semester.B．The end of the semester.C．The beginning of the semester.D．The end of the course.
A．The middle of the semester.
B．The end of the semester.
C．The beginning of the semester.
D．The end of the course.
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