If only I______hard in the past few months! But I didnt work hard enough and failed the ma

学历类 专四 已帮助 人

If only I______hard in the past few months! But I didnt work hard enough and failed the maths examination.

A.work

B.worked

C.have worked

D.had worked

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。