walk straight ( )three minutes. you'll see it ( )the right. 选择 A at ,on B for,on c in , at

walk straight ( )three minutes. you'll see it ( )the right. 选择 A at ,on B for,on c in , at
大哥大姐们,帮帮忙.跪求答案,关系到我英语能否及格的题目呀,帮忙吧,谢绝做广告的和外行人!注意点哦好好思考哦