“I'm D-d-david,” he _________.

Look, ____________ in his green T-shirt. A: David comes here B: here comes David C: comes here David D: here David comes

----- Hello, Yang Lin speaking.----Hello, Yang Lin. ________ A: This is David. B: I’m David C: It is David D: That is David

oot用户目前在自己的主目录中，想进入david用户的主目录，可以使用命令（）。 A: cd ~david B: cd ../home/david C: cd D: cd /home/david

Why is David being invited A: To make the woman angry. B: To please the man’ s mother. C: David is the man’ s good friend. D: David is good at carrying on conversation.

Adam Smith: () A: and<br/>David Ricardo both opposed free trade. B: opposed<br/>free trade, but David Ricardo supported it. C: supported<br/>free trade, but David Ricardo opposed it. D: and<br/>David Ricardo both supported free trade.

The earliest statement of the principle of comparative advantage is associated with A: David Hume. B: David Ricardo. C: Adam Smith. D: Eli Heckscher.

The theory of comparative advantage was introduced by the English economist_______. A: Adam Smith B: David Hume C: Jeremy Bentham D: David Ricardo

The birthday party is in _____. A: Rose's house B: David's house C: Rose's school D: David's school

Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation. What does the man say about David A: David is not a serious student. B: David doesn’t need to worry because he has a scholarship. C: David won’t speak with him. D: David wants to move back to his hometown.