小题1:he came to school as usual.
小题2:so interested in?
小题3:It seemed that they were speaking to me in person.
小题4:If it is fine tomorrow, I will walk up the Great Wall.
小题5:I asked why he smiled, but he couldn’t remember smiling to me.
小题1:come to school表示上学的含义，本题为过去故使用came，as usual变松像往常一样的含义，故本句空格处填he came to school as usual.
小题2:interested in 表示对某事感兴趣，make后可跟形容词interested，故本题空格处填so interested in?
小题3:似乎或好像可用it seened that，speak to sb表示同某人交流的含义，in person表示亲自的含义，故本题空格处填It seemed that they were speaking to me in person.
小题4:本题为条件状语从句使用if来引导，从句为将来用一般现在时，主语为将来时，使用will+动词原形，walk up the Great Wall表示去登长城的含义，故本题可翻译为If it is fine tomorrow, I will walk up the Great Wall.
小题5:表示原因可用why，动词问ask后跟的是一个宾语从句，why后应跟陈述句的顺序，他微笑应写成he smiled，remember doing表示记得做某事，smile to sb 表示对某人微笑的含义，故本题可翻译为I asked why he smiled, but he couldn’t remember smiling to me.