5. I am delighted … you passed your exam.

A. that

B. to

C. in order to

D. so that

6. We will begin … a brief discussion of the problems.

A. from

B. with

C. at

D. on

7. Tree leaves … to wrap things.

A. should used

B. should be used

C. should been used

D. should be use

8. … is a wonderful natural fertilizer.

A. Compost

B. Plastic

C. Envelop

D. Garbage

9. Glass is broken up, melted and made into new … .

A. silverware

B. hardware

C. ironware

D. glassware

10. Is the rubbish … every day?

A. collect

B. collecting

C. collected

D. be collected

11. In 1876, the telephone … first introduced by Bell and Watson.

A. was

B. is

C. has been

D. had been

12. It’s important … wildlife in the area.

A. to conserve

B. conserving

C. conservation

D. conserve