4.他们一直在谈笑.They are talking and laughing_______ _______ _______.

题目

4.他们一直在谈笑.They are talking and laughing_______ _______ _______.
study hard ,and you will catch up with others.合并为一句话

答案

They are talking and laughing all the time.
You will catch up with others if you study hard.