英语高手速进,一定要啊,

题目

英语高手速进,一定要啊,
1.-Hello,Mary.What are you doing?-I'am watching a match.It started at 8pm.And___on for another half an hour.A.was B.had been C.will be D.has been 【C】
2.-Excuse me,where's the hotel?-Go___the forest and____the foot of the mountain you will find it.A.through,under B.through,at 【B】
3.Where___the recorder?I can't see it anywhere.-I___it right here,but now it's gone.
A.have you put,put B.did you put,have put 【A】
4.Isn't it hard to drive downtown to work?-Yes,that's why___I to work by train.
A.have gone B.have been going 【B】
后面的【 】是正确答案.一定要给我解释,让我弄懂.

答案

1主要考察将来时的用法,由于要表达的是比赛还将持续半小时的意思,所以用will be最合适；2考察介词搭配,go through意为穿过,at the foot of是固定搭配,没什么道理好讲,死记硬背吧；3考察对现在完成时与过去时的掌握,...