More and more people have realized that we won’t have cleaner water to drink unless something ______

More and more people have realized that we won’t have cleaner water to drink unless something _______soon.

#44577

is done

was done

will be done

to be done

推荐题目

These days students in some schools ______ not to use mobile phones.

#44924

ask

asked

are asked

were asked

— Sixteen –year-olds should ____ to drive.

#44604

not be allowed

be allowed

not be allowed

be allow

Doctor Wang often asks us           too much meat.

#44489

don’t eat

not eat

not to eat

doesn’t eat

 Professor Wang _______to give us a talk next week.――Really ? That is good news .

#44606

will invite

is going to invite

will be invited

has invited

When he was at college, he and his friends          to organize a party.

#44647

are asking

were asked

was asked

asks

共461题