I ______ go to bed______ my mother came back home.
| A．won’t, until | B．didn’t, until |
| C．will, until | D．/, when |
The volunteer spoke as clearly as she could_____________the visitors understand her.
A. to makeB.makingC.made
--Is Jack in his room?
---No,I saw him _____ out with his backpack just now.
A. go B. going C. went
.--- Cathy could swim when she was only 4 years old.
---_______________.
A. So did Jack.
B.So can Jack
C. So could Jack
Waste water ____________________into Xiang River.It’s our duty to keep it clean.
A. shouldn’t be poured
B. mustn’t pour
C. can’t pour
______is very popular among the young people.
A.Chew gum
B. Chewing gum
C.To chewing gum