A. whenever B. however C. whichever D. whereverPlease c……

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．/；/

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.