________ doesn’t seem to have been much difficulty in solving the problem.

   A. It      B. That       C. There      D. He

Mr. Mike doesn’t understand ________ made his wife so upset this morning.

       A．what was it      B．why it was that C．how that was    D．what it was that

---- _____________?

--- Fine, I've got used to the life there and I've made some friends.

A. How are you              B. How are you doing  

C. Are you getting on well  D. How do you do

It will cost a lot of time _______ , I think we shall need it and it will certainly be sueful to us _______.

       A. What’s more; sooner or later                         B. As a result; now and then

       C. At the same time; more or less                   D. After all; here and there

These natural parks are very important for preserving many animals, which would _______ run the risk of becoming extinct.

       A. otherwise   B. therefore    C. nevertheless       D. however

His sudden look of fear made _____ clear that he had something to do with the matter．

A．him                       B．this                        C．it                           D．that

You must follow the directions exactly, and if you should become_______ , you must take the time to go back again and read them over.  

A.confused        B.to be confused     C.to confuse           D.confusing

-----Let’s go to a place _______ we can make a round—trip in one day? 

------What about one _______ we can climb and swim?

A. to which; where        B. where; where            C. where; in which D. in which; where http:/

All the students __ a loud laugh when the teacher told them the joke.

A．let off                    B．let down                C．let out             D．let up

The terrible noise is ____ me mad.

A. turning                    B.driving?                  C. setting                     D. putting