_____ to do the work, I should do it some other day.   

A. If were I　　    B. I were　     C. Were I　  D. Was I

--- I ______ so busily recently that I ______ no time to help you with your math.

　--- That’s OK. I can manage it by myself.

A.have been working; have

B.have worked; had

C.am working; will have

D.had been working; had had

—Did you find the missing couple in the mountain yesterday?

   —No, but we ________ to get in touch with them ever since.

A.have tried　　　　　　　　　　          B.have been trying

C.had tried　　　　　　　　　　　         D.had been trying

—What do you think of the book？

—Oh，excellent．It's worth ___________ a second time．?

A.to read????? B.to be read          C.reading?????  D.being read

You should ______ what your parents expect of you.

A. live up to               B. stand up to  C. look up to             D. run up to

I missed what was happening because I wasn’t ______ very closely.

A. noticing            B. running  C. watching         D. glancing

“Look! Everything here is under construction.” “What is the small building that ______for?”

A. is being building                                    B. has been built

C. is built                                                  D. is being built

----“Aha, you’re a chain smoker!”

------“Only at home. Nobody _______ that but you.”

A. discovered          B. had discovered  C. discovers           D. is discovering

It’s good that we _____ to the park because it’s started to rain.

A. don’t go                 B. hadn’t gone    C. didn’t go               D. wasn’t going

— ________ ?      

       —I’ll have a hot dog, please.

A. Would you like some more      B. I’ll take your order, OK

C. What do you like      D. Hi, have you ordered yet