My room is very comfortable ______ the fact that it is very small.
| A．because of | B．although |
| C．in spite of | D．as |
I'll stay here _____ everyone else comes back.
| A．even if | B．as though | C．because | D．until |
Although it's raining, _____ are still working in the field.
| A．they | B．but they | C．and they | D．so they |
Speak to him slowly _____ he may understand you better.
| A．since | B．so that | C．for | D．because |
You'll miss the train ______ you hurry up.
| A．unless | B．as | C．if | D．until |
When you read the book, you' d better make a mark _____ you have any questions.
| A．at which | B．at where | C．the place | D．where |