1. Some of the experiments ____ in the book are easy to perform.

　　A. describing B. to be described C. described D. to describe

　　2. The fog ____ dense, all the ferry boats were suspended.

　　A. is B. being C. been D. was

　　3. All the exam papers ____, the teacher sent the class home.

　　A. having been handed in B. having handed in

　　C. handing in D. being handed in

　　4. Such __ the case, I can’t afford to support him.

　　A. being B. is C. has been D. been

　　5. ____, she went back to her room.

　　A. There was no cause for alarm B. There being no cause for alarm

　　C. Being without cause of alarm D. Without having cause for alarm

　　6. The house ____ will be our new laboratory.

　　A. to build B. building C. having built D. being built

　　7. Robert remembers ____ to Paris when he was a very small child.

　　A. to take B. being taken C. to be taken D. taking

　　8. Upon being questioned he denied _____ the article.

　　A. writing B. having written C. to have written D. to write

　　9. ______with surprise, she was unable to utter a word.

　　A. Having overcome B. Overcome C. Overcame D. Overcoming

　　10. The government proposes that some thing ___ to get rid of air pollution.

　　A. will be done B. be done C. should do D. is done