In order to keep fit, he chooses vegetables and fruit in ____to any kind of meat.
A．comparison B．preference C．control D．advantage
While watching television，____ ．
A．the doorbell rang B．the doorbell rings
C．we heard the doorbell ring D．we heard the doorbell rings
To good relationships with your teachers and classmates, you should learn to be on good terms with them.
A．bring up B．add up C．keep up D．take up
A great number of students said they were forced to practice the piano.
A．to question B．to be question C．questioned D．questioning
________ the tower building，where you can see the whole city
A．Standing on the top of B．If you climb to
C．When you reach the top of D．Get to the top of
Up to now, they _______enough money for students who can’t afford to go to school.
A．are raising B．have been raising C．have raised D．had raised
