问题补充：
There are about 40 boy students in our class.同意句英语同义句，are about换成一个单词
答案：
There involves 40 boys students in our class.
Our class has开头的肯定不对
======以下答案可供参考======
供参考答案1:
There are nearly 40 boy students in our class.
供参考答案2:
Our class has about 40 boy students.
供参考答案3:
There are almost 40 schoolboys in our class.
供参考答案4:
Our class has about 40 boys.
供参考答案5:
我们班有40个男学生
供参考答案6:
Our class has about 40 boy students.
供参考答案7:
Our class has about 40 boy students.
供参考答案8:
Our class has about 40 boy students.
供参考答案9:
我觉得没个对的，别生气哦
供参考答案10:
There involves 40 boys students in our class.
9楼的单词拼错了.
