(2013·吉林四校高三一診)I really don't know how to thank you, but for your help, I ________ my lost necklace.

A．couldn't have found B．mustn't have found

C．couldn't find D．wouldn't find

Many dog owners treat their pets like human beings, ________ if they do not have children of their own.

A．absolutely B．especially

C．eventually D．extremely

(2013·東北三校4月二次聯(lián)考)No matter how healthy you ________ be, you need to consult a doctor from time to time.

A．should B．will C．must D．may

—I think that every need of the customer should be attended to.

—________.

A．I'd love to B．I'm with you on that

C．It's my pleasure D．It's up to you

(2013·南京二模)—What do you think of the news in today's newspaper?

—We shouldn't ________ the trouble of helping others only because what we do may invite trouble.

A．knock off B．take off

C．keep off D．break off

(2013·揚(yáng)州一中三模)—How do you think I can make up with Johnson?

—Set aside ________ you disagree and try to find ________ you have in common.

A．what; what B．where; what

C．what; which D．where; which

The project will help people understand the many threats to the natural environment ________ endangered plants and animals live.

A．which B．when C．where D．that

(2013·黑龍江雙鴨一中月考)It was several years ________ I realized ________ David had lied to me.

A．when; that B．that; when

C．before; that D．until; why

We ________ jump to conclusions before we have all the facts.

A．couldn't B．mightn't C．shouldn't D．mustn't

(2013·西安一中期末)Is he the only one of the students who ________ here just now?

A．is B．are C．was D．were