单项选择题

A．seldom
B．often
C．always
D．never
<上一题 目录 下一题>
热门 试题

单项选择题
What was the concern expressed by a publisher trade group
A．Google Inc. didn’t stop scanning copyrighted books.
B．Google Inc. didn’t give publishers enough time to decide which titles can not be copied.
C．Google Inc. violated copyrights.
D．Google Inc. failed to accomplish its program.
单项选择题
What can an exhaust system do if it is efficient
A．It can prevent the waste gas from escaping.
B．It can let the waste gas and compound escape quickly out of it.
C．It can prevent the engine from producing waste gas.
D．It can store as much waste gas as possible.
相关试题