（A） that may be unlikely to emerge in other procedures or weeks of ordinary interviewing
（B） whose emergence is unlikely in other procedures or weeks of ordinary interviews
（C） that might not emerge in other procedures or in weeks of ordinary interviewing
（D） that may not emerge under other procedures or weeks of ordinary interviewing
（E） unlikely not to emerge during weeks of ordinary interviewing or in other procedures
18.The demand for airplane mechanics is expected to grow about ten percent a year in the next decade，largely because new federal rules calling for major modifications to older planes and because the air-lines are adding hundreds of new jets
（A） new federal rules calling for major modifications to older planes
（B） new federal rules， which call for major modifications to older planes
（C） new federal rules call for major modifications to older planes
（D） major modifications to older planes called for by new federal rules
（E） major modifications to older planes are called for according to new federal rules
19.In the main， incidents of breakdowns in nuclear reactors have not resulted from lapses of high technology but commonplace inadequacies in plumbing and wiring.
（A） not resulted from lapses of high technology but
（B） resulted not from lapses of high technology but from
（C） resulted from lapses not of high technology but
（D） resulted from lapses not of high technology but have stemmed from
（E） resulted not from lapses of high technology but have stemmed from
答案：1.D 2.E 3.C 4.E 5.C 6.D 7.D 8.D 9.D 10.E 11.D 12.D 13.C 14.B 15.D 16.A 17.C 18.C 19.B
