完成句子,使改写后的句子完整,并与原句意思相符,注意每空只填一个单词。

小题1:I knew nothing about it before you told me.

I _____________ know anything about it ____________ you told me.

小题2:Unit Two is more difficult than any other unit in this book.

Unit Two is ____________ ____________ difficult in this book.

小题3:My mum asked me not to swim in the sea.

My mum asked me to __________ ___________ in the sea.

小题4:There is no life on the earth without water.

There is no life on the earth ___________ there is ___________water.

小题5:We are planning to go to Zhanjiang soon.

We are _____________ ___________ Zhanjiang soon.

细胞因子在刺激后迅速分泌，其浓度可以在短时间内增加（）

A.10倍

B.1倍

C.1000倍

D.2倍