小学四年级英语选择题
（ ）1、The windows ______ green.
A . amB. is C. are
() 2. This is ______ classroon.
A .myB.me C. I
( )3.______ the floor,please.
A.sweep B.Sweep C.clean.
() 4."let's"是下列哪个两个单词的缩写
A.let is B.let hasC.let us
( ) 5.There are four lights _______ our classrom.
A.inB.on C.at

请翻成汉语,并说明为什么选择正确的答案,谢谢大家