In the future, many buildings will be ....... by solar energy.

A. hot B. hoter C. hottest D. hotter

Environmental ....... is everybody's responsibility.

A. protect B. protection C. destruction D. damage

He decided, very ........., not to drive when he was so tired

A. sense B. sensitively C. sensibly D. sensible

We’ll live a happier and ...... life if we keep our environment clean.

A. health B. healthy C. unhealthy D. healthier

Don't eat those vegetables. They're ............

A. poison B. poisoning C. poisoned D. poisonous

You should write a letter of ..... to that institute.

A. inquire B. inquiry C. inquisition D. inquisitor

Physical ______ are good for our health.

A. activities B. activists C. actions D. acts

English is an ______ language to learn.

A. easiness B. easily C. easy D. ease

Their___________ has lasted for more than 20 years.

A. friendly B. friend C. friends D. friendship

You will have to work hard if you want to ___________.

A. succeed B. successfully C. success D. successful