课时作业14
Unit 4 Astronomy: the science of the stars
Ⅰ.单项填空
1．(2013·山东青岛二中月考)After the 18th CPC National Congress, many new laws and policies will be ________ to make sure of the rapid and steady growth of China's economy.
A．in power B．in control
C．in authority D．in force
解析：in force生效。句意：十八大后，许多新法律和政策将会生效来保证中国经济的快速平稳增长。
答案：D
2．A rare virus just attacked my computer________，so it has broken down.
A．theory B．system
C．style D．design
解析：system体制，系统；theory理论；style风格；design设计，布局。句意：一种罕见的病毒刚刚攻击了我的电脑系统，导致电脑坏了。
答案：B
3．(2013·三亚调研)The bus driver asked the passengers not to hurry and get on the bus________.
A．in turn B．in return
