单项选择题

No matter where it is used, "Flextime" system has proved ______.

A．entirely effective
B．a complete failure
C．to be disliked by the employers
D．too difficult to carry out
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单项选择题
According to Flextime system workers need not ______.
A．work by the same timetable
B．work all the weekdays
C．go to work at weekends
D．go to work in the early morning
单项选择题
Scarely had I reached there ______ it began to rain.
A．than
B．that
C．when
D．while
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