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56、Her hair was golden when she was a child, but it went darker__________ she grewup.
A．if
B．as
C．since
D．even

57、Call the university operator,__________ you will find the phone number of Professor Smith.
A．so
B．and
C．when
D．before

58、The instructor won't give them any help__________absolutely necessary.
A．when
B．if
C．unless
D．once

59、Many of the people__________refused to answer any questions.
A．question
B．questioned
C．questioning
D．were questioned

60、The boy denied __________anything to do with that bank raid.
A．have
B．to have
C．having
D．have had

61、The number of the employees in our company is__________that in theirs.
A．twice as large as
B．twice as many than
C．as twice many as
D．as twice as

62、I wish I__________in the sun by a swimming pool instead of sitting in this classroom.
A．have lain
B．were lying
C．lay
D．lie

63、It is essential that all the reports to be published__________twice.
A．be checked
B．would be checked
C．were checked
D．will be checked

64、__________life could be found on Mars was once believed by scientists.
A．What
B．As
C．That
D．While

65、__________food was rotting in the warehouses, the poor did not have enough to eat.
A．While
B．Where
C．Why
D．Which