【正确答案】 C

【答案解析】[听力原文]
M: I don't remember exactly what the lab hours are. But they posted on the door.
W: I just checked that schedule and it says that the lab opens at ten.
M: I need to go to the lab to finish my experiment-now.
W: But it's all locked up.

两人讨论的是实验室开门的时间。从第二个说话人的话语中可以知道“时间表上说10点开门，但现在却锁着门，”隐含的意思是“现在实验室的门不应该锁着，而应该是开着的”，解题的关键是听出语气的转折词but和短语“be locked up”，后者变为主动语态为“lock up...”，意思是“把……锁好”，例如：lock up a door，lock up a house，up可以省略。C选项中的“be supposed to do sth”意为“应该……”。

【正确答案】 D

【答案解析】[听力原文]
W: The flowers are lovely, aren't they? And I like the music, too.
M: Next time I'll not choose the place to eat.
W: Why is that?
M: It hurts me to pay 50 dollars for so little food.

这是一道场景题，解这类题的关键就是想象出他们在做什么。根据“flowers、music、the place to eat”和“pay 50 dollars for so little food”可以知道他们在餐馆吃饭。D选项“eating out”就是“去餐馆吃饭”的意思。

【正确答案】 D

【答案解析】[听力原文]
W: Hello, Mr. Smith. This is Mary. I'm sorry to tell you that Dr. Brown has to change your appointment to tomorrow at the same time. His flight is late. He is still in New York now.
M: Oh, well, thank you for calling. I'll see him in his office then.

此题解题的关键是搞清考点，对话的主题是更改约会时间，但考的却是对话中的非主要信息，其他皆为干扰信息。“change the appointment to”是“改变约会时间到……”的意思。

【正确答案】 A

【答案解析】[听力原文]
M: Lovely weather, the air is so warm and everything looks fresh and green.
W: Yes, it's wonderful after the long cold winter. It looks as if summer is coming.

从第一个人的话中就可以断定这是一个关于天气的对话，而解题的关键在于把握住“after the long cold winter”和“summer is coming”，冬天已过，夏天未到，那现在就是春天了。

【正确答案】 D

【答案解析】[听力原文]
M: How much is this shirt?
W: 29 dollars each. This sort is on sale, yesterday it was 35 dollars.

数字题。对话中一共出现了两个数字，关键是听清两个代表价格的数字各代表什么，29 dollars是现在的价格，而35 dollars是原来的价格，由问题判断前者为考察项，经过简单计算，得出正确答案D。“on sale”是“甩卖，减价出售”。