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。