准备做某事用英语怎么表达

　　The whole class is working hard preparing for the exams.

　　全班都在努力用功准备考试。

　　I'm not prepared to discuss this on the phone.

　　我不想在电话里谈论此事。

　　Parents play a crucial role in preparing their child for school.

　　父母对孩子做好上学的准备起着至关重要的作用。

　　I had no time to prepare.

　　我当时没时间准备。

　　The college prepares students for a career in business.

　　这个学院是培养商务人才的。