Most of the audience wondered what idea a man who is deaf from birth can have _____ music.
| A．with | B．in | C．of | D．at |
Water，which seems so simple and common，is ________ makes life possible.
| A．what | B．that |
| C．which | D．how |
I just wonder ________ that makes him so excited.
| A．why it does | B．what he does |
| C．how it is | D．what it is |
________ caused the accident is still a complete mystery.
| A．What | B．That | C．How | D．Where |
I’m afraid he’s more of a talker than a doer，which is ________ he never finishes anything. (2011·山东，26)
| A．that | B．when |
| C．where | D．why |
Scientists study ________ human brains work to make computers. (2012·四川，17)
| A．when | B．how |
| C．that | D．whether |