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第52页

信息发布者：

risk

doubt

rules

percentage

disadvantages

not to throw

is repaired

are going to have

was driving

has practised

will carry out a survey to learn more about

will get ill from living on another

not to miss the first part of the programme

the challenging work (is) worth the risk

After all

is different from that on the Earth

His decisions often worry

Travelling in space for a long time will do harm to

to improve my listening skills