the engry is_____makes the cells able to do their work?A.that B.which C.what D.such为什么.谢...

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the engry is_____makes the cells able to do their work?A.that   B.which   C.what    D.such为什么.谢...

the engry is_____makes the cells able to do their work?A.that B.which C.what D.such为什么.谢...
the engry is_____makes the cells able to do their work?
A.that B.which C.what D.such
为什么.谢...

the engry is_____makes the cells able to do their work?A.that B.which C.what D.such为什么.谢...
C
is后面的从句可以是宾语从句或者表语从句.
从句内部缺少主语,因此用What