If Adam （） hard, he would have passed the midterm exam.A.worked

If Adam （） hard, he would have passed the midterm exam.A.worked
B.had worked
C.were working
D.has worked答案：B难度：1知识点：词汇与结构部分\大学英语A\结构A\虚拟A
A.worked
B.had worked
C.were working
D.has worked
正确答案：B
解析:词汇与结构部分\大学英语A\结构A\虚拟A