二:语法和词汇知识(共20小题,每小题1分,满分20分)。6._________we must keep in mind is that we must protect water and use it wisely.
This kind of clothes are out of nowadays.
.It is very difficult to his mind because he is always changing his mind.
I don’t think the two parties can agreement in the near future.
. Knowledge of English is a must in international trade.
Cloning the sheep ----Dolly is a big in science.