初三英语几个简单填介词的句子.
We're busy studying ____ a big test.
If you can't do it by yoursrlf,you can ask others___ heip.
Don't get good grades ___ copying other students' answers.
Ilike studying ___ friends.We can help each other.
They are talking ___ how to study well at school.
最好能有讲解.