_____ of the teachers are women in our school.
| A．Two third | B．Two threes | C．Two thirds | D．Second three |
Don’t talk with your partners in class_______ you are asked to do so.
A. ifB. whenC. unless
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