This passage is primarily about __________

A.raising the world' s temperature only a few degrees would not do much harm to life on earth

B.lowering the world' s temperature merely a few degrees would lead many major farming areas to disaster

C.almost no temperature variations have occurred over the past decade

D.the world' s temperature will remain constant in the years to come

A.slip into B.make up for

C.set up D.catch up with

A.shares the same view with the scientists

B.is uncertain of its occurrence

C.rejects it as being ungrounded

D.thinks that it will destroy the world soon

A.caused widespread damage in the countryside

B.affected the entire eastern half of the United States

C.had damaging effect on health

D.existed merely in urban and industries areas

A. jumping

B. five track and field events

C. throwing

D. ten track and field events

A. before he was nine years old

B. when he was 16 years old

C. when he was 24 years old

D. before his parents passed away

A. fishing

B. hunting

C. swimming

D. singing

A. India

B. Pennsylvania

C. Oklahoma

D. Sweden

A.Never mind. Shall we meet on Sunday?

B.Your project? I have no time studying your project.

C.OK. What about Friday morning?

D.OK. Library is the best place for us to meet.

A.Speaking. B.I am Helen. C.It' s me. D.This is me.