Only ________ can you hope to make improvement in the operating system.
| A．by the way |
| B．on the way |
| C．in a way |
| D．in this way |
_______ you start eating in a healthier way, weight control will become much easier.
| A．Unless | B．Although | C．Before | D．Once |
Wind is now the world’s fastest growing ________ of power.
| A．source | B．sense | C．result | D． root |
---Ok, I'll fix your computer right now. ---Oh, take your time..
| A． | I can't stand it | B． | I'm in no hurry |
| C． | That's a great idea | D． | It's not my cup of tea |
Give me a chance, ________ I’ll give you a wonderful surprise.
| A．if | B．or | C．and | D．while |
— How about dinner tonight? It's on me.
— ______ .
| A．You are welcome | B．Oh, I'd like to | C．Well, I'm afraid so | D．That's all right |