He ______ the 8:25 train because he didn't leave home till 8:30.
A.couldn't have caught
B.ought to have caught
C.shouldn't have caught
D.mustn't have caught
第1题
下列不应选用青霉素G的情况是
A.梅毒
B.伤寒
C.鼠咬热
D.气性坏疽、钩端螺旋体病
E.钩端螺旋体病
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