The boy asked his mother _______ go out to relax himself or not.
| A．whether could he | B．if he could | C．that he could | D．whether he could |
It’s not easy to change habits，________ with awareness and selfcontrol，it is possible. (2013·重庆，23)
| A．for | B．or |
| C．but | D．so |
Don’t turn off the computer before closing all programs，________ you could have problems. (2013·北京，22)
| A．or | B．and |
| C．but | D．so |
I was glad to meet Jenny again，________ I didn’t want to spend all day with her.
(2013·大纲全国，23)
| A．but | B．and |
| C．so | D．or |
She says that she’ll have to close the shop ________ business improves.(2013·江西，28)
| A．if | B．unless |
| C．after | D．when |
Mark needs to learn Chinese________his company is opening a branch in Beijing.
(2013·山东，26)
| A．unless | B．until |
| C．although | D．since |