—How do you know that she likes singing
—I often hear her ______ after class.

单项选择题People have always been（）about exactly how life on earth began.

A. curious
B. excited
C. anxious
D. careful

单项选择题There used to be a museum in the east of the city, ______

单项选择题Most people agree that the present role of women has already affected U,S. society. ______, it has affected the traditional role of men.

单项选择题When I came back, I found my bicycle was ______.

单项选择题Hainan Island is ______ largest island of China.

单项选择题Tim will call me as soon as he ______ my package.

单项选择题Please call my secretary to arrange a meeting this afternoon, or ______ it is convenient to you.

单项选择题It is illegal for a public official to ask people for gifts or money （） favors to them.

A. in preference to
B. in place of
C. in agreement with
D. in exchange for

单项选择题William Sidney Porter, known as O. Henry, is most famous for ______.

单项选择题Many lifestyle patterns do such（）great harm to health that they actually speed up （）weakening of the human body．

A．a；/
B．/；the
C．a；the
D．/；/