oppo128790 2/24/2024 10:31:11 AM

10. Because we ________ be there by 8.30, we should hurry.

A. have to

B. may

C. ought

D. are able to

11. It is very noisy. I can’t hear what they are saying. ________ you turn down the radio?

A. Should

B. Could

C. Must

D. Have to

12. I believe that solar energy ________ help people conserve the earth’s natural resources.

A. may

B. ought to

C. should

D. must

 

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