I can't figure out ________ it is that makes him so difficult at school.
| A．how | B．what |
| C．why | D．which |
He noticed that the straight part of the dance was different in the afternoon from _______ it had been in the morning. （2006年宜昌市模拟题）
| A．that | B．where | C．what | D．which |
The shopkeeper did not want to sell for _______ he thought was not enough. （2005年山东省高考题）
| A．where | B．how | C．what | D．which |
Nobody believed his reason for being absent form the class _______ he had to meet his uncle at the airport. （2006年重庆高考题）
| A．why | B．that | C．where | D．because |
_______ is our belief that improvements in health care will lead to a stronger , more prosperous economy. （2006年浙江省高考题）
| A．As | B．That | C．This | D．It |
I just wonder that makes him so excited. （2006年山东省高考题）
| A．why it does | B．what he does | C．how it is | D．what it is |