托业，托福，雅思。这3个考试的口语部分，难易程度如何？区别在哪？

我来说一下TOEFL的：
6tasks
1&2 are independent tasks.Each task you have 30seconds to prepare your answer. 3-6are integrated tasks. In the integrated task you may take notes to organize your answer. And you have 30seconds to prepare, then 45seconds/1minute to respone.

According to my understanding, TOEFL is the most difficult test I experienced for several reasons. To begin with, the speaking section of TOEFL is beyond a student imagination. In detail, you have to sit before an one-eyed monster and response for its questions in limited time, which can not be organized perfectly in the few seconds. Second, TOEFL is one of the longest time consuming test. Specifically, this test provides no other choice beside to glue to the computer for almost four hours. And more importantly, you have to fill out each answer in 45seconds; otherwise, participator destined a doomed consequence.

刚写的一个第一题的模板，背下来就很简单，但...还有一些其他的细节就是语音、语调、连贯、当然内容是不可或缺的。
真的TOEFL口语考个想要的分数非一日可成（都