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
________ energy is generated from natural resources—such as sunlight, wind, rain, tides and so on.
A. Recyclable B. Non-renewable
C. Rechargeable D. Renewable
