What should we do when there’s a flood — We should_____________.

________do you usually do at weekends— I usually do homework and help my parents with the housework.

In the Gulf of Mexico the animals’ presenceclose to shore means their usual habitat is badly polluted, and the crowdingcould ________ mass die-offs as fish run out of oxygen.

We are happy Mrs. Wang because she always her help to us .

Look,Mr.Hu is on the other side of the street. —-It____ be him.He has gone to Lanzhou.