Part IV    Cloze                    (20 minutes)

As a physician who travels quite a lot, I spend a lot of time on planes listening for that dreaded “Is there a doctor on board?” announcement. I’ve been  71  only once—for a woman who had merely fainted. But the  72  made me quite curious about how   73  this kind of thing happens I wondered what I would do if  74  with a real midair mecial emergency-with out access  75  a hospital staff and the usual emergency equipment. So  76  the New England Journal of Medicine last week  77  a study aobut I –flight medical events. I read it  78  interest.

The study estimated that there are a (n)  79  of 30 in-flight medical emergencies on U.S. flights every day. Most of them are not  80  ; fainting and dizziness are the most frequent complaints.  81  13% of them-roughly four a day—are serious enough to  82  a pilot to chage course. The most common of the serious emergenceies  83  heart trouble, smokes, and difficulty breathing. Let’s face it: plane rides are  84  . For starters, cabin pressures at high altitudes are set at roughtly  85  they would be if you lived at 5,000 to 8,000 feet above seal level. Most people can toterate these pressures preety 86  , but passengers with heart disease  87  experience chest pains as result of the reduced amount of oxgen flowing through their blood.  88  common in flight problem is deep venous thrombosis—the so-called economy class syndrome (综合症),  89  happens , don’t panic. Things are getting better on the in—flight-emergency front. Thanks to more recent legislation, flights with at 90 one atttendant are starting to install emergency medical kits to treat heart attacks.

71. A) surveyed                     B) addressed                            C) called                           D) informed

72. A) accident                      B) incident                        C) disaster                 D) condition

73. A) soon                          B) many                                  C) long                      D) often

74. A) treated                       B) identified                      C) provided                D) confronted

75. A) to                              B) by                                C) for                            D) through

76. A) while                         B) when                                  C) since                            D) before

77. A) collected                     B) discovered                           C) published               D) conducted

78. A) with                          B) by                                C) in                            D) of

79. A) nubmer                      B) sum                             C) amount                  D) average

80. A) significant                     B) common                       C) serious                  D) heavy

81. A) For                           B) But                              C) So                            D) Or

82. A) require                       B) engage                         C) command                     D) inspire

83. A) contain                      B) confine                         C) include                  D) imply

84. A) stimulating                    B) stressful                       C) tedious                  D) enjoyable

85. A) who                          B) which                                 C) that                       D) what

86. A) easily                         B) casually                        C) harshly                  D) reluctantly

87. A) ought to                     B) used to                         C) need                      D) may

88. A) one                           B) other                                   C) another                  D) any

89. A) whichever                    B) wherever                      C) whatever               D) whenever

90. A) most                         B) least                             C) best                            D) worst