1 Now adays students are under much-----(press).

问题描述:

1 Now adays students are under much-----(press).
2 My son has over 300 stamps in his -----(collect).
3 Some useful----(invent) have changed our life.
4 After -----(graduate),I will join the army.
请解释下啊为什么那么填

1.pressure, under pressure 处于压力之下
2.collection, in one's collection 在某人的收藏品种
3.invention, 名词,发明.
4.graduating或graduation,after是介词,其后既可跟名次也可跟动名词.