3.D事实判断题。文章第一段告诉我们：在班上讲话不同于在家中谈话或闲聊，当有一大群人安静下来，等待你的讲话时，你会感到有点不自然，由此可见，D项为最佳选项。

2.B细节理解题。从文中的…where a large group of people will remain silent，可见B项为正确答案。 这里的silent与选项中的quiet同义，均意为“安静”。

1.C。细节理解题。根据文章第一段中的：You must speak so that they can hear you-loudly enough and clearly enough but without trying to shout or appearing to force yourself. 可以看出C项为正确答案，而A、B、D三项均与这句话意义不符，可排除。

4.C 纵观全文，可以看出讲的是青少年喝酒的问题。

C.

3.由最后一句可知。

2. D 由第二段“They may keep telephone calls and meetings a secret and not want anybody to touch their things.”可知。

1. B 由第一段，用排除法。

5.C 由最一段“Later on…”可知 。

B.

4.A 由“. For a long time, she talked about honesty and emphasized(强调)…”可知老师反复强调的就是cheat的反面诚实(honesty)。

3.D 由“Later, after the test papers had been turned in, the teacher asked me to stay in the room…”可知考完试后，老师让他留下(stay behind)。