Question

【题目】I ________________ in the exam, but I was too careless.

A.should have been carefulB.must have been careful

C.should be carefulD.must have been careful

Answer 1

【答案】A

【解析】

考查情态动词+have done的用法。句意：我本应该在考试时仔细点，但是我太粗心了。结合语境可知，此处是虚拟语气，考查should have done本该做某事（事实上没做），故选A项。