I commanded that he (should) go at once.

* have a good command of 掌握......

Applicants are expected to have a good command of English.（ ）

4. ....., the Internet is now the first source they turn to. (P34, L8)

turn to... 求助于...

My mother is always the first one ________ I turn for help whenever I'm in trouble

　A. who B. whom C. to whom D. to who

【拓展】 turn to 1. (使)转向2. (把注意力等)转向3. 翻书到4. 求助于5. (使)变成

(1) Please turn to the last page of the book. （ ）

(2) The bus turned to the right. （ ）

(3) Some farmers turned to raising pigs. （ ）

(4) When you are sceptical about the meaning of a word, turn to the dictionary. （ ）

【拓展】有关turn的短语： turn against 背叛，与...反目

turn around 转身，翻转；扭转 turn down 拒绝；调小

turn in 交还；上交 turn off 拐弯；换道；关；使...厌烦

turn on 打开；使...感兴趣；取决于 turn out 结果（是）；生产出；关，熄灭

　turn over 翻转；移交 turn up 出现；开大点；被发现

　in turn=by turns 轮流，依次 take turns to do... 依次做...

　He turned into a teacher four years later.= He turned teacher four years later.

5.However, some people are skeptical. They claim that the Internet is useless and that using the Internet is a waste of time.(Page34, lines13---14)

*skeptical /skeptical adj.怀疑性的,好怀疑的, be skeptical about...对....怀疑

I am rather skeptical about their chance of winning. 我很怀疑他们是否还有机会获胜。

我对他们解决这个问题的能力颇为怀疑。I am skeptical about their ability to solve the problem.【句子结构】that the Internet is useless and that using the Internet is a waste of time.这两个that都引导宾语 从句，第一个that可以省略，第二个that不能省略。

* claim vt. 声称/宣称；认领；索取；夺去生命

　　Some people claim that it is not safe to buy things on the Internet. ( )

My friend lost his computer. Fortunately, he claimed it at the lost-and-found office two days later. ( )