51、They always give the vacant seats to ________ comes first.
A．whoever
B．whomever
C．who
D．whom
52、In Africa, educational costs are very low for those who are ________ enough to get into universities.
A．ambitious
B．fortunate
C．aggressive
D．substantial
53、Professor Wang, ________ for his informative lectures, was warmly received by his students.
A．knowing
B．known
C．to be known
D．having knownB
54、Our manager is ________ an important customer now and he will be back this afternoon.
A．calling on
B．calling in
C．calling up
D．calling for
55、A fire engine must have priority as it usually has to deal with some kind of ________.
A．precaution
B．crisis
C．emergency
D．urgency
56、He said that the driver must have had an accident; otherwise he ________ by then.
A．would have arrived
B．must have arrived
C．should arrive
D．would arriveA
57、The film provides a deep ________ into a wide range of human qualifies and feelings.
A．insight
B．imagination
C．fancy
D．outlook
58、It is high time that such practices ________.
A．are ended
B．be ended
C．were ended
D．must be endedC
59、Urban crowdedness would be greatly relieved if only the ________ charged on public transport were more reasonable.
A．fees
B．fares
C．payments
D．costs
60、The doctor had almost lost hope at one point, but the patient finally ________.
A．pulled out
B．pulled through
C．pulled up
D．pulled over