题目内容：

It seemed that the old man ____ for something over there.Alooks Blooked Cwas looking.Dhas looked 为什么是C,我觉得是B You must study hard if you _____ want to fail the exam.Awon't.Bdon 't Chave 't.Dhadn't 为什么是B,我觉得是A

优质解答

根据句意“似乎有个老人在那边找东西”语境,老人正在寻找,所以选was look
主将从先,主句中的将来时也可以根据需要使用情态动词,从句现在时