—We're doing a lot to protect our environment, but it is not good enough. —So we should try______ to look after it.
| A．hard | B．harder | C．hardest | D．hardly |
Be careful when you take exams. Check your paper to ________ there are no mistakes before you hand it in.
| A．make sure | B．find out | C．think about | D．deal with |
— Can we ask Jeff for help with our English?
— You’d better not. He is the last person _______ others.
| A．helps | B．helped | C．helping | D．to help |
— Could you tell me_____ ?
— About half an hour.
| A．how long it takes to walk to the Science and Technology Museum from school |
| B．how long it took to walk to the Science and Technology Museum from school |
| C．how far was it to walk to the Science and Technology Museum from school |
| D．how far it was to walk to the Science and Technology Museum from school |
John _______ at his uncle’s for 3 days and he is now at home.
| A．stayed | B．has stayed | C．had stayed | D．was staying |
—How well did Sally do in writing ?
—Among the students, she made the ________ mistakes.
| A．fewer | B．fewest | C．less | D．least |