-–Won’t you go shopping with your mother?

---No. ______ she promises to buy me a new sweater.

A. Now that                    B. If only   C. As though   D. Unless

Tom often has to be called several times ______ he comes downstairs for dinner.

A. before       B. until       C. when       D. then

I arrived half an hour earlier     I had time to talk with him before the meeting.

A. as soon as   B. as a result   C. in order to   D. so that

     we admit that there are still some problems about NMET, we don’t mean that it is of no use．

A．Until  B．While          C．As     D．Unless

She took an umbrella with her this morning ____ she should be caught in the rain.

 A. so that     B. in order that     C. in case        D. now that

_____ life pace continues to speed up, we are quickly losing the art of enjoyment.

A. With　　　 B. When　　 C. As　　　 D. While

While dancing happily at home,        ．

A．the door bell rang            B．the door bell rings

C．we heard the door bell rings    D．we heard the door bell ring

_______ , I’ll wait for you to have dinner together. Be back as early as possible.

A. However late it is            B. No matter how it is late  

C. However it is late            D. No matter how late is it

I will write down what I have seen and heard ______ memories are still fresh.

A. before       B. while      C. though       D. unless

_______ there was no conclusive evidence, most people thought he was guilty.

 A. When     B. As far as      C. As long as    D. While