21.In the _____ of my not being there to meet you, our representative will take you to your hotel.
A.possibility
B.occurrence
C.occasion
D.event
22.Paul was so _____ that he took no credit to himself for his good work.
A.moderate
B.modest
C.medium
D.moral
23.Although I spoke to him many times, he never took any _____ of what I said.
A.notice
B.attention
C.consideration
D.warning
24.It is no easy thing to _____ the meaning of every idiom in English.
A.get by
B.get in
C.get on
D.get at
25.The book only _____ the causes of the war and does not do justice to the influence of the slave trade.
A.counts on
B.touches on
C.takes on
D.pulls on
26.We must take a firm _____ against the lowering of educational standards.
A.stand
B.place
C.position
D.reason
27.It never _____ my mind that he might refuse the request.
A.passed
B.filled
C.crossed
D.occurred
28.At the sight of the police officer, the thief _____.
A.got to his feet
B.took to his heels
C.rose to his feet
D.dragged his heels
29.The guide told us that an incident _____ here in 1925.
A.took place
B.was taking place
C.had been taking place
D.had taken place
30._____, one must understand mathematics.
A.A good scientist
B.In order to be a good scientist
C.It's a good scientist
D.Being a good scientist