【彭文俊】評論
(A) in two days (2天後,可知應用未來式)They are going hiking in two days.他們兩天後要去健行. be going to=will(B) last night (昨晚,可知應用過去式)They went hiking last night.(C) yesterday (昨天,可知應用過去式)They went hiking yesterday.(D) every week (每周,可知應用現在式)They go hiking every week.故選(A)