— How was his explanation at the court?

— So convincing ______ that I entirely approved of it.　

　 A. sounds it 　　　　　 B. it sounds　　　　 　 C. does it sound　　　　　 D. did it sound

 ______ such experience will constantly trouble you in your business.

   A. Lacking               B. Lack                   C. Being lack           D. To be lacked

 In history, every great culture had its own ideas of beauty ______ in art and literature.
A. expressed            B. to express              C. being expressed        D. to be expressed

 In summer, iced sweet food is really ______ to children.

A. constant           B. attractive           C. impressive            D. direct

— Would you mind my challenging you to a game of chess?

— ______.

A. No, never mind 　　　　　　　　　 　　 B. Yes, you are welcome　

C. No, go ahead please　　　　　　 　 　　 D. Yes, I’m expecting

______ proves that Jack is really enthusiastic and cautious.

　 A. It happened that B. When it happened　　

C. What happened　　　　 D. That has happened

 Pro. Smith will give us a report to ______ the world present economic problems.

A. arrange               B. analyze                 C. announce               D. argue

— The water was left running all night long.

— It seemed that John ______. He was the last to do some washing.

A. should be blamed B. was to blame　 　 　

C. had been blamed　　　 　 D. was to be blamed

 Your luggage is over weight, so you must decide what to ______.

A. leave out          B. divide into           C. cut off                 D. carry on

 Not for a moment ______ that this disease was caused by certain virus.

A. he have doubted  B. he doubts          C. did he doubt          D. he did doubt