The word "cubs" in the fourth paragraph is closest in meaning to __________.

A.Saving energy.

B.Conducting scientific research.

C.Seeking international cooperation.

D.Saving polar bears and their home.

A.bus drivers who weren't reckless

B.driving alone

C.a television set on the bus

D.no billboards along the road

A.exciting

B.comfortable

C.tiring

D.boring

A.are heading for

B.are making

C.are avoiding

D.are creating

A.two-thousand dollar

B.two thousand dollars

C.two-thousand-dollar

D.two-thousand-dollars

A.in

B.as

C.for

D.at

A.computers

B.jobs

C.activities

D.systems

A.human activities could not continue

B.there could not be weather forecasting systems

C.many activities would have to change their present form

D.banks would not be able to go on with check clearing

A.After re-training, all employees in the firm get new jobs.

B.A considerable proportion of people are employed in key posts,

C.The firrn keeps all of its original staff members.

D.The decrease in staff members may be balanced by the increase of firm activities.