Eating too much fat can______ heart disease and cause high blood pressure.

A. result from　　 B. contribute to　 C. attend to　 D. lead in

Everybody said it was a perfect marriage；no one had ever known　　　　 couple.

A.the happier　　　 B.a happier　　 C.a happiest　　 D.the happiest

Scientists have to work hard to keep _____ with modern discoveries and developments.

　 A. company　 B. track　 C. touch　 D. pace

We must work out a plan on _____ with the rubbish as soon as possible.

A. what to do   B. what to deal    C. how doing   D. how dealing

The first use of atomic weapons was in 1945. and their power ______ increased enormously ever since.

　 A. is　　　 B. was　　　 C. has been　　 D. had been

---Have you seen my e-mail about our TESL, project?

　 ---Yes. Luckily, I checked my e-mails yesterday. Normally, I 　　 my e-mail-box for days.

　 A．haven’t opened　　　　　　 B．didn’t open C．hadn’t opened　 D．don’t open

-- Ready to quit guessing, Sandy?

-- No, no, I hold on! I think I 　　　 to the answer.

A. come　　　　 　 B. have come　　　 　 C. came　　　　 D. am coming

The man we followed suddenly stopped and looked as if_______whether he was going in the right direction. (2003安徽春)

A. seeing B. having seen　 　C. to have seen　 D. to see