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1.we must do something to ______the roof falling in.

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1.we must do something to ______the roof falling in.
A.prevent B.protect C.defend D.keep
解释说keep .from doing sth.的from不能省略.换言之prevent .from doing sth.的from可以省略了,那stop .from doing sth.和protect .from sth.的from可以省略吗?
2.you didn’t reach the required level,______,you faild in the diving test.
A.in another word B.that is to say in other words C that is
选C 请问有没有A项的表达?那改成in other words 是不是对的?
帮我说说第一问中哪些词组的from是可以省的
1.we must do something to ______the roof falling in.
keep .from..
from不能省略,后面加 所要防止发生的动作
如果省略了,就变成keep.,那就是 保持 的意思,保持屋顶掉下来?不对
首先,没有in another word这样的说法
that is to say=in other words=换句话说,也就是说 的意思
that is ,（插入语,）那意为着,也就是说（和上面的一样）
B是错在 两个短语不能连在一起用,太重复了
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