There are some police cars in front. What do you suppose _____?

A. is the matter     B. is happened       C. is the wrong      D. the trouble is

.---Mary has a very low opinion of George.

---It can' t be any worse than ____ of her.

A. he  B. his    C. him    D. he does

I smell something ____ ______ in the kitchen. Can I call you back in a minute?

  A. burning            B. burnt                 C. being burnt          D. to be burnt

---Who is the girl standing over there ?

---Well , if you       know , her name is Mabel .  

A. may        B. can        C. must       D. shall

The book was received so eagerly that it         on the first day.

     A. sold up       B. was sold up      C. was sold out          D. sold out

She is quite a different girl _____ she was five years ago.?

A. from              B. to?           C. than            D. with

Books are the important records we keep___ man’s thoughts, ideas and feelings.

A. up         B. of         C. for         D. on

 “Where is it?” “Where is _____? I don't know what do you mean?”

　　A. what    B.    that?    C. where    D. so

They kept trying _____ they must have known it was hopeless.?

　　A. if     B. because?  C. when    D. where??

 Mother told Jim to watch the milk until it boiled and then _____ off the gas.?

　　A. turn       B. turning      C. turned       D. having turned