Cat naps helped build up energy in the body. _____

A can't

B mustn't

C needn't

D shouldn't

A thinking

B think

C to think

D thought

A since

B when

C as

D while

A. idea

B. punishment

C. behavior

D. instruction

A. if the winter is especially warm

B. during all of the year except the winter

C. in the winter as well as in other seasons

D. during the evenings in the winter

A.but

B.what

C.as

D.that

A.essentially

B.especially

C.specially

D.strangely

A. made same words

B. made different kinds of words

C. had a same language

D. used some sounds

A. American stores could provide new kinds of products to people.

B. High tech describes a technology that is not traditional.

C. "State of the art" is not as popular as "high tech".

D. A modern plough pulled by oxen is "state of the art".

A. Since the computer revolution, the expression "state of the art" has become popular.

B. "State of the art" means something that is the best one can buy.

C. With the rapid development of computer, "state of the art" computer may easily become out of date.

D. All kinds of products are "state of the art" nowadays.