A:You'd better prepare for the examination.
你最好为考试做一下准备。
B:I don't think the exam will be very hard.
我觉得考试不会很难。
A:You should change your attitude, or you will not pass the course.
你应该改变这种态度,不然你无法通过这门课。
B:Maybe you're right. I have been too lazy lately.
也许你说得对。近来我一直很懒惰。