56、 The doctor had almost lost hope at one point，but the patient finally__________ ．
A．pulled out
B．pulled through
C．pulled up
D．puHed over


57、 Many a__________realized that this doesn’t make any sense．
A．persons has
B．persons have
C．person has
D．person have


58、 So little__________ about stock exchange that the lecture was completely beyond me．
A．did I know
B．I had known
C．I knew
D．was I known


59、The president is believed__________ seriously ill．
A．being
B．to be
C．been
D．be


60、 I wrote it down __________I should forget it．
A．in case of
B．in case
C．in order that
D．for fear of


61、 A__________to this problem is expected to be found before lon9．
A．resuit
B．response
C．settlement
D．solution


62、 Deserts and high mountains have always been a__________ to the movement of people from place to place．
A．barrier
B．fence
C．prevention
D．jam


63、 __________ is well-known，the environment in China is badly in need of improvement．
A．It
B．That
C．As
D．What


64、 He faced up to these difficulties with his__________ courage．
A．usual
B．normal
C．regular
D．average


65、 The car__________ halfway for no reason．
A．broke off
B．broke down
C．broke up
D．broke out