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

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．/；/

单项选择题For many years, people （）electric cars. However, making them has been more difficult that predicted.

A. had dreamed of
B. have dreamed of
C. dreamed of
D. dream of

单项选择题—How about your trip to Hainan —It couldn't have been ______. Sometimes I went swimming in the sea; sometimes I lay on the sand.

单项选择题Bats are surprisingly long-lived creatures, some ______ a life span of around 20 years.

单项选择题Unless he ______ to help us, we shall lose the game.

单项选择题It was said that he died（）a fever.

A. in
B. by
C. of
D. from

单项选择题During the war there was a serious lack of food. It was not unusual that even the wealthy families had to ______ bread for days.

单项选择题墨子的教育思想中，除注重文史知识的掌握和逻辑思维能力的培养外，还包括( )。

单项选择题普通语言学可以帮助人们认识和掌握英语教学的( )。