So involved with computers ____ that the leaders at the summer computer camps often had to force them to break for sports.
| A．has the children become | B．did the children become |
| C．has become the children | D．became the children |
It remains to be seen ________ the newly formed committee's policy can be put into practice.
| A．that | B．which |
| C．what | D．whether |
Helen has just heard the news from her father ________ her boyfriend David will come back soon.
| A．when | B．how |
| C．which | D．that |
________ you said at the meeting describes a bright future for the company.
| A．When | B．How |
| C．What | D．That |
Time is of no importance to great thoughts, ________ are as fresh today as when they first passed through their authors' minds, ages ago.
| A．what | B．that |
| C．which | D．where |
Willpower is a kind of quality, ________ is ________ it takes to do anything well.
| A．what; which | B．what; what |
| C．which; which | D．which; what |