this time Tom____careful enough,otherwise he would not have passed the test.A.was B.should be

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this time Tom____careful enough,otherwise he would not have passed the test.A.was B.should be

B 这里是一个虚拟语气句子 表示应该要···否则会···

B

选B。这是对将来的虚拟,从句有三种形式A:过去式(实义动词)B:were to be ;C:should do;主句用should /could/would be ;