问答题

It is generally not advisable ______ (一个女人在怀孕第28周时乘飞机旅行).

【参考答案】

that a woman travel by air after the 28th week of pregnancy
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In Para.4,the word Rusken most probably means ______.
A．a traffic police who directs the traffic
B．a bad example to give a caution
C．one person who breaks the traffic regulations
D．the driver loved by the passengers
问答题
______ (我订阅这份杂志的主要原因) is to keep abreast of advances in science.
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