请教一些初中英语语法的问题~!

题目

请教一些初中英语语法的问题~!
1.which of the following is right ?_______
A.she is English B. she is a French C. she is an ENGLISH D.she is America
2.ROOM 320 is the ___office
A.teachers B.tescher's C.teachers'D.teacher
3.Peter was late for work because of ____
A.some heavy trafficsB.any heavy trafficC.a heavy trafficD.heavy traffic
4.The ___are big and bright in our school
A.classroom's windows
B.classrooms' windows
C.windows of the classroom
D.windows of the classroom's
5.This chair is made of ___
A.Wood
B.woods
C．wooden
D.some woods
我知道答案，有没有人说说为什么啊.. ACDCA

答案

1.C 表示人时ENGLISH前加不定冠词AN
2.C 表.的用’S
3.D BECAUSE OF后加名词
4.B 后面名词为复数是前加S’
5.A WOOD不可数,不需加S,而WOODEN为形容词,首先排除