Waste water must be prevented　　　　 into the river.We must find ways.

A.to be sent　　　 　 B.from sending　 C.being sent　　　　 D.from being sent

I had no idea when and where ________..

A. it happened　　　　　　　　　　 B. does it happen　

C. it had happened　　　　　　　　 D. had it happened

Tom was a black slave and he at last ______ the cotton farm to join the North Army.

A. left 　 　 B. escaped　　 C. ran away 　 D. fled

We all know that a good sleeping bag is a necessary part of every camper’s ________.

　A. experiment　　 B. entertainment　　 C. equipment　　 D. settlement

Energy is ____ makes one work.

A. what                                                    B. something

C. anything                                               D. that

Thev____________ from England to India used to take 6 months.

— Are you satisfied with what she has done?

— Not in the least．It couldn’t be __________．

A．any worse　 　　　 B．any better　 　　 C．so bad　 　　 D．so good

Our teacher entered the classroom, __________.
A. a book in hand  B. book in hand    C. book in his hand    D. a book in hands

Much to everyone’s surprise, the ordinary-looking man with a worn coat was _____ other

than Einstein himself, who was well-known for his Theory of Relativity.

A. none　 　　　 B. nothing　 　　　 C. not　 　　　 D. nobody

She is the only one of the students who　　 a winner of the match．

A．1s　 B are　 C．have been　　 D．had been