When asked about the biggest problem today, many people say that it is the serious energy crisis. They are afraid that the world will soon run out of oil and run short of food. But other people hold o

What is the biggest problem in today's life？

A．Pollution.

B．Air pollution.

C．Nois

done to improve it. And by doing so, you would be regarded as a person with initiative.()

A．comment

B．concern

C．problem

D．way

The biggest problem when travelling internationally on business is

A．difference of culture.

B．language barriers.

C．the time difference.

About how many adult Americans have the "weight problem"？

______ percent.

When he was asked about the missing camera, the boy ______ ever seeing it.

A．refused

B．denied

C．opposed

D．pretended

When he was asked about the missing camera, the boy _________ ever seeing it.

A．refused

B．denied

C．opposed

D．pretended