According to Professor Johnson，we don't have to read the book if we don't want to，as it is ______．（ ）
| A． |
worthwhile |
B． |
necessary |
C． |
optional |
D． |
serious |
When word came _______ Zhang Bichen became the winner of the “Voice of China 2014”, her fans, greatly excited, stood up cheering for her.
| A．that | B．what |
| C．which | D．Where |
Wallace Chung can sing, dance and act as well. This is ________ he has appealed to his fans for nearly 20 years.
| A．why | B．because |
| C．that | D．how |
The prize will go to the writer ________ story shows the most imagination.
| A．that | B．which |
| C．whose | D．what |
My father retired in 2008, _____ he has been devoting his time to gardening.
| A．at which | B．since when |
| C．when | D．after that |
During the meeting a young man cried out suddenly and threw his notebook at Ma Yingjiu, ________brought the room to disorder.
| A．this | B．it |
| C．and that | D．and which |