Ⅱ.补全信息
选择正确选项填入空白处，补全所给句子提供的信息：
A．so that they will not float away and block the air pipes
B．which allow us to breathe in space
C．that occupy most of the day are demanding
D．which are more like large cupboards
E．which locates and tracks lightning over large regions of the Earth
1．We usually sleep in private quarters， ，or in sleeping bags attached to the walls or the ceiling.
2．The routine tasks ，but they can also be extremely rewarding.
3．I have been working on one experiment ．
4．Frist，we put on our spacesuits， and protect us from exposure to the cold and radiation.
5．Salt and pepper are only in liquid form， ．
[答案] 1—5 DCEBA
