Theory is based on practice and ________ serves practice．

A．in turn                B．by and by           C．by chance           D．in this case

 Look at the new computers, of ______ none are produced abroad.

       A．them                   B．whom                 C．which                 D．these

 —What about the picnic plan?

    —Not ________ yet．It’s being discussed..

A．decided               B．decide                 C．deciding              D．to be decided

 After dry days, everyone appreciates ______ when there is a timely rain．

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

 While reading, you should not always ___________ a dictionary to find the meaning of each new word.

A．look up         B．turn to            C．look for         D．turn out

 —Do you know what to do in the lab, Mike?

   —Oh, sorry I don’t----just _____if I could get a ticket for the Shanghai Expo.

A．wonder               B．wondered            C．wondering           D．having wondered

 A man of value never thinks of everything only in ______ of money.

A．terms                  B．orders                 C．times                  D．sights

 —How ­­­­­_____ you have been late then in such a small town?

    —Lots of turns in the streets, and the buildings look all the same.

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

 We should learn how to value what we have ______ it is too late．

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

 But as to the fine quality of the products, our price is very _______．

A．high                   B．fit                       C．reasonable           D．small