I was watching the news on TV _______ the power went off.
| A．when | B．as | C．while | D．until |
_______ asks you to get rid of the bad habits is quite right.
| A．Who | B．Those who |
| C．Anyone whom | D．Whoever |
When I try to find _______ that prevents so many people from taking part in the program,it seems to me that there are two main causes.
| A．why it does | B．what it does |
| C．what it is | D．why it is |
_______ fashion differs from country to country may reflect the cultural differences from one aspect.
| A．What | B．That |
| C．This | D．Which |
Our kind teacher wanted to teach us _______ he knew about this lesson.
| A．that | B．that all |
| C．everything which | D．what |
We decided, in view of his special circumstances, _______ we would admit him for a short period.
| A．/ | B．that |
| C．whether | D．what |