“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 earliest statement of the principle of comparative advantage is associated with A: David Hume B: David Ricardo C: Adam Smith D: Bertil Ohlin

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