It was not until she got home __ Mary realized she had left her books in the classroom.
| A．when | B．that | C．where | D．before |
I bought a dress for only 10 dollars in a sale; it was a real ______.
| A．exchange | B．business | C．bargain | D．trade |
Will you have a free evening tonight? ______, let’s have a dinner together.
| A．If not | B．Why not | C．If so | D．What’ more |
—Would you like to come on Friday or Saturday?
—______
| A．Yes, of course. | B．Another is better. | C．What’s the matter? | D．Either is OK. |
. When talking about his road to success in an interview, he owed his success ______ his mother.
| A．for | B．in | C．on | D．to |
The style of Western art has changed many times ______ Chinese art has changed less often.
| A．while | B．before | C．since | D．however |