we have to ___(is) useful when we use fire
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we have to ___(is) useful when we use fire
题目是不是有错?
题目是不是有错?
填be
因为to后面要接原形
(题目错了,useful应该是careful)
因为to后面要接原形
(题目错了,useful应该是careful)
When there is a fire,we have to learn___ to call
we have to be ___ when we do everything.
sometimes fire is useful,it's ()we must be ()w
We use b__ to keep warm when it is cold.
the internet is very useful.we can use it( )english
( )useful information we have!
We don't have to ___ the electricity we don't use.A afford B
It is not until ___ the things ___ we used to have ___ we le
We have to ___ ___ ___ him .
英语翻译We must have water to live .If the water we use is not c
learned,fire,is,when,to,we,what,do,there,a 连词成句
英语翻译We have no idea about when man first began to use salt,b