It's just ________ among countries to host the Olympics as to win an Olympic medal.

A．much as a competition

B．as a much competition

C．as much a competition

D．a competition as much

—Do you think Jack is to blame?

　 —Yeah, it was very rude 　　　　facial paper to the guests at the table.

　 A.of him to throw　　　　　　　　　　　　　　 B.for him to throw

　 C.that he threw　　　　　　　　 D.enough to throw

I am just back from a tiring journey and have nothing ________to do this evening.

It was some time　　　　 we realized the truth.

A.when　　　　　　　 B.until　　　　　　　　 C.since　　　　　　　　 D.before

Some friends tried to settle the quarrel between Mr and Mrs Smith without hurting the feeling of _______, but failed.

A. none　　　　　　　　　　 B. either

C. all　　　　　　　　　　　 D. neither

As global warming continues to be　　 major concern for the future of our planet，people are starting to turn to　　 gmen living practices to help save it for future generations．

A. a：the　 B．a；不填　 C不填；the　 D．the；the

Was _____ at the air battle of Jane 8, 1944, _____ was led by Captain Johnson _____ peter lost his life?
  A. it; when; that     B. that; that; who     C. it; which; that     D. it; which; when 

_____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.

A.While　　　 B.As　　 C.If　　　 D.Since

________ it was going to rain, I would have taken my umbrella to work.

A. If I knew　　 B. Did I know　　 C. If I have known　　 D. Had I known

—It cost me 30 yuan to get here.

　 —Well, it was crazy of you to take a taxi _______ you could come by bus as well.

　 A．while　　　 B．if　　　　　 C．when　　　　 D．because