How can you expect him to make any progress ____ you never give him a chance to have a try?
| A．when | B．unless | C．even though | D．until |
Just as Professor Scotti often______ it, success is ninety-nine percent mental attitude.
| A．gets | B．makes | C．puts | D．means |
-- Do you think it's a good idea to make friends with your students?
-- _____ , I do. I think it's a great idea.
| A．Really | B．Obviously | C．Actually | D．Generally |
- 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