After he was knocked down by a bike, he was badly hurt and had to ______ to his feet.
| A．stand | B．struggle | C．run | D．sit |
Jack’s house has been broken into twice and now he takes________ against theft
at any time.
| A．risks | B．chances | C．turns | D．precautions |
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 |