如果生活在受污染的环境中,人们很容易生病。(fall)Living in a polluted environment, people may ___ ___ easily.
That they were wrong in these matters ____ now clear to us all.
Large quantities of water ____ for irrigation.
Between the two rows of trees ____ the teaching building.
I have finished a large part of the book, the rest of which___ more difficult.
The whole class ____ the teacher attentively.