被商务主管部门暂停或撤销对外经营许可的企业，海关实行( )管理。
A．A类管理
B．B类管
C．C类管理
D．D类管理
参考答案：D
Grace doesn't want to move to New York because she thinks if she ________ there，she wouldn't be able to see her parents very often.
(2012·安徽)
A．lives
B．would live
C．has lived
D．were to live
手点钻装卸钻头时，按操作规程必须用（）。
A.钥匙
B.榔头
C.铁棍
D.管钳
