(2011·江蘇)The fact that so many people still smoke in public places ________ that we may need a nationwide campaign to raise awareness of the risks of smoking.

A．suggest B．suggests C．suggested D．suggesting

—Why does the lake smell terrible?

—Because large quantities of water ________.

A．have polluted B．is being polluted

C．has been polluted D．have been polluted

________ a strange plant！I've never seen it before.(2011·遼寧，33)

A．Which B．What C．How D．Whether

It sounds like something is wrong with the car's engine.________，we'd better take it to the garage immediately.(2011·江蘇，33)

A．Otherwise B．If not

C．But for that D．If so

________ a certain doubt among the people as to the practical value of the project.

A．It has B．They have

C．It remains D．There remains

—What's the matter with Della?

—Well，her parents wouldn't allow her to go to the party，but she still ________.

A．hopes to B．hopes so

C．hopes not D．hopes for

(2011·北京，31)The shocking news made me realize ________ terrible problems we would face.

A．what B．how C．that D．why

—Who should be responsible for the accident?

—The boss，not the workers.They just carried out the order ________.

A．as told B．as are told

C．as telling D．as they told

—Have you got any particular plans for the coming holiday?

—Yes.________，I'm going to visit some homes for the old in the city.

A．If ever B．If busy

C．If anything D．If possible

—Did Linda see the traffic accident?

—No，no sooner ________ than it happened.

A．had she gone B． she had gone

C．has she gone D．she has gone