Looking back，we have reasons to believe that ___more prosperous and stronger China will surely make new contributions to _____civilization of mankind．
| A．a；a | B．a；the | C．the；the | D．the；a |
________everyone here，I wish you a pleasant journey back to your country.
| A．By means of | B．On behalf of |
| C．In search of | D．For fear of |
Mrs.Smith finds it hard to clear up the mess，as her children are always ________ whenever she tries to.
| A．in the way | B．on watch |
| C．in sight | D．on the line |
It will be a big help if you go to the store and get what we need for dinner.________，I’ll set the table.
| A．As a result | B．On the whole |
| C．In the meanwhile | D．As a matter of fact |
The Smiths are praised ________ the way they bring up their children.
| A．from | B．by |
| C．at | D．for |
I have an appointment________Dr.Smith，but I need to change it.
| A．to | B．off |
| C．with | D．from |