______, he still cannot make himself understood.
| A．So clearly he speaks English | B．So clearly does he speak English |
| C．Clearly as he speaks English | D．As he speaks English clearly |
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 ________ to people 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 |