（A） associated with other calves， they will require less medication and gain weight quicker than do
（B） associated with other calves， they require less medication and gain weight quicker than
（C） associate with other calves， they required less medication and will gain weight quicker than do
（D） associate with other calves， they have required less medication and will gain weight more quickly than do
（E） associate with other calves， they require less medication and gain weight more quickly than
20.Although early soap operas were first aired on evening radio in the 1920's， they had moved to the daytime hours of the 1930's when the evening schedule became crowded with comedians and variety shows.
（A） were first aired on evening radio in the 1920's， they had moved to the daytime hours of the 1930's
（B） were first aired on evening radio in the 1920's， they were moved to the daytime hours in the 1930's
（C） were aired first on evening radio in the 1920's， moving to the daytime hours in the 1930's
（D） were aired first in the evening on 1920's radio， they moved to the daytime hours of the 1930's
（E） aired on evening radio first in the 1920's， they were moved to the 1930's in the daytime hours
21.The Olympic Games helped to keep peace among the pugnacious states of the Greek world in that a sacred truce was proclaimed during the festival's month.
（A） world in that a sacred truce was proclaimed during the festival's month
（B） world， proclaiming a sacred truce during the festival's month
（C） world when they proclaimed a sacred truce for the festival month
（D） world， for a sacred truce was proclaimed during the month of the festival
（E） world by proclamation of a sacred truce that was for the month of the festival
22.The boom in agricultural exports in the early 1970's emptied United Stated grain bins and many were led to thinking that overproduction was now a problem of the past.
（A） many were led to thinking that overproduction was now.
（B） many had been led to thinking of overproduction as if it were.
（C） The thought this led to was that overproduction had were.
（D） Led many to the thought of overproduction as if it were.
（E） Led many to think that overproduction had become.
23.In astronomy the term “red shift” denotes the extent to which light from a distant galaxy has been shifted toward the red， or long-wave， end of the light spectrum by the rapid motion of the galaxy away from the Earth.
（A） to which light from a distant galaxy has been shifted
（B） to which light from a distant galaxy has shifted
（C） that light from a distant galaxy has been shifted
（D） of light from a distant galaxy shifting
（E） of the shift of light from a distant galaxy
答案：1.A 2.B 3.D 4.C 5.C 6.B 7.A 8.E 9.D 10.A 11.A 12.E 13.A 14.E 15.C 16.C 17.B 18.A 19.E 20.B 21.C 22.E 23.A
