18、We shouldn’t spend our money testing so many people, most of ____ are healthy.

A. that               B. which               C. what                 D. whom

17、The tiger, once a ____ animal to humans, is now ____ of disappearing on the earth.

A．dangerous, danger       B．dangerous, in danger

C．in danger, in danger     D．danger, in danger

16、 Laszlo Biro is considered ____ the ball point pen.

A. to invent                                        B. inventing  

C. to be inventing                               D. to have invented

15、We’ll do what we can ____ his book published as soon as possible.

A. have              B. to have              C. having                     D. had

14、As more and more trees ____, tigers can ____ hide and hunt.

A. are cut down, not longer                 B. cut down, no longer

C. cut up, no more                             D. are cut down, no longer

13、Julia ____ leave her store ____ a man entered the room to buy a book.

A. was about to, before                        B. was about to, while

C. was about to, when                         D. was to, then

12、John may phone tonight. I don’t want to go out ____ he phones.

A. in case              B. in that case                C. so that               D. in case of

11、 ____, he caught up with others.

A. With the help of the teacher’s     B. With the teacher’s help

C. By the teacher’s help                  D. On the teacher’s help

10、 This book ____ 12 units, ____ the unit of Good Friends.

A. contains, including                                B. includes, containing

C. contains, includes                                  D. including, contains