His suggestion is good in _______ but can’t be put into practice.
| A．theory | B．short | C．general | D．brief |
The police were seeking more information to find out ______ the rich merchant.
| A．who was it that killed | B．who it was that killed |
| C．it was who killed | D．who was it killed |
_____ puzzles me most is that I don’t know ______ the difference between the two lies.
| A．What, how | B．What, where | C．That, what | D．How, which |
Determination is a kind of basic quality and this is _____ it takes to do jobs well.
| A．why | B．that | C．which | D．what |
_________anyone should want to kill her was unbelievable.
| A．Whether | B．That | C．What | D．Where |
-----Alice looks blue today.
-----Yes, I asked her, but she wouldn’t say _____ troubled her.
| A．why was it that | B．that was why | C．it was what | D．what it was that |