How long do you think ________ the computer company brings out a new product?

A. it will be before         B. will it be until

C. will it be when           D. it will be that

We were stopped by the security guard and told that only when we showed our licenses_________.

A. we could be allowed in               B. we could allowed in       

C. could we be allowed in               D. could we allow in

--Have all the mysteries been cleared up?

--- Almost. But ______ only one question ______.

A. there remains; answered                B. it remains; to be answered

C. there remains; to be answered        D. it remains; answered

---Did you invite Kacy to your party?

---I would like ______, but I was too busy and forgot to call her.

A. to have                       B. to invite her     C. inviting her D. having invited her

It was too noisy outside. Not until I shouted at the top of my voice ______ his head.

A. did he turn             B. had he turned         

C. he had turned              D. he turned

________ , but it is also a good idea to reduce the potential dangers.

A. Not only a fun thing is it to do     B. Not only a fun thing to do it is    

C. Not only it is a fun thing to do     D. Not only is it a fun thing to do

      we move the picture over there? Do you think it will look better?

A．If only                      B．What if   C．As if  D．Even if

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

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

I just wonder ______ that makes him so excited.

A. why it does      B. what he does          C. how it is            D. what it is

He would rather lose his life ____ give in .

 A. to  B. than  C. for   D. about