are改成is：
There is a big lake and some interesting places in it .one of the tallest students in our class are xiao ming .改错这题还是谓语动词不对，依然把are改为is：one of the tallest students in our class is xiao mingthey will go to america by a plane .改错。多了一个a，删去就对了：they will go to America by plane