单项选择题

A．It breaks down at times.
B．The alarms sometimes do not sound.
C．There are a lot of false alarms for small quakes.
D．The computer controlling the system gives wrong orders occasionally.
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单项选择题
A．Susan doesn’t think the negative comments from students can have an adverse effect on teachers.B．Susan admits that mean comments from students can lead to the director’s poor impression.C．Teachers should not reward poor performance at school work.D．Teachers should try their best to arouse students’ interest in writing.
A．Susan doesn’t think the negative comments from students can have an adverse effect on teachers.
B．Susan admits that mean comments from students can lead to the director’s poor impression.
C．Teachers should not reward poor performance at school work.
D．Teachers should try their best to arouse students’ interest in writing.
单项选择题
A．Long life.B．Good luck.C．Bad luck.D．Neither of the above.
A．Long life.
B．Good luck.
C．Bad luck.
D．Neither of the above.
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