完成句子（共10小题；每小题1分，，满分10分）
小题1:The school year ____ _____ _____ (被分成)two semesters.
小题2:They have ____ _____ (建造)a lot of high-rise buildings recently.
小题3:She explains exactly what is happening and _____ ______ _____ (因此)my work is improving.
小题4:Travelling _____ _____ ______ (以……速度)over 400 kilometers per hour, the train can complete the 30-kilometre journey in eight minutes.
小题5:When we use metals, it is important to know how they _____ _____ (对……起反应)different substances.
小题6:NSFNET _____ _____ _____ the Inter-Network, or “Internet”. （作为…而闻名）
小题7:The reaction of metals with these substances can be _____ _____ _____（按顺序排列）
小题8:In America, students and teachers are quite _____ _____ each other, but teachers can have big problems with discipline. （和……在一起很放松）
小题9:Ghan _____ _____ _____ Afghanistan （是…的缩写）
小题10:She gave us instructions and then we worked _____ _____ （单独地，独自地）
2KCl+3O2↑