(2011山东潍坊)The new treatments________by Norman Bethune helped a number of soldiers．
A．invent
B．invents
C．inventing
D．invented
(2012北京)Today，computers are really helpful．They________everywhere．
A．use
B．are used
C．used
D．were used
(2013甘肃白银)A year has four seasons and it________twelve different star signs．
A．divided into
B．is dividing into
C．dividing into
D．is divided into
Battery-operated slippers are used________seeing in the dark．
A．to
B．as
C．by
D．for
The children________not to play with fire．
A．are told
B．tell
C．asking
D．ask
The Northern Tower of Xin Hua has a long history．It________in 1835．
A．is built
B．was built
C．was building
