And there, almost______in the big chair, sat her little brother, who never had to be

told to keep quiet.

A.having lost 　 B.losing 　 C.to be lost 　 D.lost

I’ll always be　 ______to you for your help.

A. in debt　　 B. debt C. running into debt　　 D. debts

The idea of fish being able to produce electricity strong enough to light a lamp is almost unbelievable, _____ several kinds of fish are really able to do this.

　　A.therefore 　　B.and 　　　　C.then 　　　　D.but

It is believed that hard work is the ____ of one’s success.

A.purpose　　　　　

B.goal　　　　　

C.guarantee　　　

D.achievement

Before she ______to the door, she ____what had happened to her computer．

A．walked; noticed 　 B．walked; had noticed　

C．walks; has noticed　 　　 D．had walked; noticed

---Mike, you have made a lot of serious mistakes in this math exam.

---_____. I checked it many times.

A. So what?　 B. I’m afraid so.　 C. What’s going on?　 D. You must be kidding.

If anything happens to her,I’ll always have it on my______ (良心，良知).