46、 The convenience of using computers has brought about a lot of__________ in classroom teaching．
A．achievement
B．advantage
C．appreciation
D．application


47、 You never told US why you were one hour late for the last meeting，__________ ?
A．weren’t you
B．didn’t you
C．have you
D．did you


48、 It is becoming a trend for large companies to__________ smaller finns by buying their shares．
A．take over
B．take off
C．take after
D．take to


49、 __________ ，I should ask them some questions．
A．Should they come to us
B．If they come to as
C．Were they come to us
D．Had they come to us


50、 I don’t regret__________ her what I thought，even if it upset her．
A．to tell
B．telling
C．tell
D．told


51、 The best method to __________this goal is to unite as many people as possible．
A．perform
B．accomplish
C．gain
D．attach


52、 Professor Wang said that he would rather his student Jane__________ to the conference．
A．go
B．went
C．gone
D．going


53、 It is high time that such practices。．
A．are ended
B．be ended
C．were ended
D．must be ended


54、 When Tom was about to speak，his father looked at him，__________ to stop him．
A．as regards
B．as to
C．as for
D．as if


55、 He spoke so fast that I didn’t __________what he said．
A．make over
B．make out
C．make for
D．make sure