词汇部分。（5分）

小题1:Don’t make n____, Your sister is studying .

小题2:I like watching TV on weekends , e_______ sport news . it’s my favourite .

小题3:Our teacher gave a _______(演讲) on the school meeting yesterday .

小题4:I always feel __________(紧张的)when I speak in public .

小题5:Please keep ________(安静)in the library .

园林树木的植物学分类法，以（）为主要依据，（）性强。