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
________ energy is generated from natural resources—such as sunlight, wind, rain, tides and so on.
A. Recyclable B. Non-renewable
C. Rechargeable D. Renewable
Effective measures have been taken to prevent _______pollution.
A. exhausted gas B. exhausting gas
C. exhaust gas D. exhaustion gas
