___,he likes Chinese very much
| A．As he is an American |
| B．An American though he is |
| C．American although he is |
| D．American as he is |
- I wonder how much you charge for your services.
-- The first two are freethe third costs $30.
| A． | while | B． | until | C． | when | D． | before |
We can never expect____ bluer sky unless we create_____less polluted world.（）
| A． | a; a | B． | a; the |
| C． | the; a | D． | the; the |
As the light turned green, I stood for a moment, not _________, and asked myself what I was going to do.
A. moved B moving C. to move D. being moved
There is nothing more I can try you to stay, so I wish you good luch.
| A．being persuaded | B．persuading | C．to be persuaded | D．to persuade |
______ by a greater demand of vegetables, farmers have built more green houses.
| A．Driven | B．Being driven | C．To drive | D．Having driven |