有机汞是A．有机氯农药 B．悬浮性颗粒物 C．挥发性有机化合物 D．人类致癌物 E．人类致畸物

A．Forty-five minutes.

B．Over an hour.

C．Less than ten minutes.

D．About twenty minutes.

A．More than fifty percent.

B．About forty percent.

C．At least ten percent.

D．Twenty or thirty percent.

A．Between five and ten dollars.

B．Between ten and fifteen dollars.

C．Between fifteen and twenty dollars.

D．More than twenty dollars.

A.Less than ten minutes.

B.Half an hour.

C.About twenty minutes.

D.Forty-five minutes.

If you have twenty papers to be typed, how long does it take to get them finished？

A．more than 48 hours.

B．more than 24 hours.

C．within 24 hours.

D．in 24 minutes.

How many companies are presenting products in the Consumer Electronics Show？

A．More than twenty thousand.

B．More than three thousand.

C．More than two hundred.

D．More than three hundred.

A. Less than ten minutes.

B. Half an hour.

C. About twenty minutes.

D. Forty-five minutes.

The people in Taiwan consume______milk per person today as they did twenty years ago.

A．more than twice as many

B．twice more than as much

C．so much more than twice

D．more than twice as much

A．More than six million.

B．More than one million.

C．More than a billion.

D．More than twenty million.