“I know she was in because I heard her radio, but she didn’t open the door.” “She___the bell.”
A.may not be hearing | B.may not have heard |
C.must not have heard | D.must not be hearing |
The environmental organization calls on customers not to purchase these _______ packages of food, clothes and gifts.
A.intrusive | B.cognitive |
C.excessive | D.sensitive |
People are advised not to smoke at home, since passive smoking is ________ topeople around them. Which is Not proper for the blank?
A.dangerous | B.protective |
C.hazardous | D.risky |
He stumbled(绊倒)on the _______ ground and fell flat on his face.
A.undeniable | B.unfair | C.unavoidable | D.uneven |
Many students today suffer from ________ problems, since they are under too much pressure.
A.recreation-related | B.pollution-related |
C.stress-related | D.pollution-free |
________ energy is generated from natural resources—such as sunlight, wind, rain, tides and so on.
A.Recyclable | B.Non-renewable |
C.Rechargeable | D.Renewable |