A．Come on! B．Take care! C．Go ahead! D．Hold on!

7、by accident 偶然，意外地(by chance)

　by design/on purpose故意地 by no accident绝非偶然

　by mistake错误地；无意中 without accident安全地，无恙地

用有关by的短语填空：(1) Some inventions really came .

(2) I don't know if it was done by accident or .

(3) I was in such a hurry that I took someone else's umbrella .

8、on the contrary 恰恰相反，与此相反

be contrary to... 与......相反 to the contrary 相反地；相反的

用contrary的短语填空：(1) Show me some evidence .

(2) The car isn't expensive. ，it's very cheap.

(3) His view about how to increase sales of products mine.

IV、重点句型:

1、find ＋复合宾语 指不知不觉地发现自己处于某种情况中，多表示意料之外的情况，可用形容词、介词短语、现在分词及过去分词作宾补。其后跟复合宾语的动词还有：see，hear，watch，notice，have等。

(1) I found my hometown much (change). 我发现家乡有了巨大的变化。

(2) When he found his wallet (steal)，he was extremely worried.

(3) Gradually you'll find him .慢慢地，你会发现他很诚实。

(4) A cook will be immediately fired if he is found________in the kitchen.

　　A．smoke B．smoking C．to smoke D．smoked

2、现在分词短语作伴随状语 可以作伴随状语，也可以作时间状语、原因状语、结果状语等。

(1) Many mice ran out of fields looking_for_places_to_hide.许多老鼠从田地里蹿出来寻找藏身之所。

(2)She stood in the rain waiting_for_her_daughter worriedly.她站在雨中焦急地等待着她的女儿。

(3) My sister，an inexperienced rider，was found sitting on the bicycle ____ to balance it.

　A．having tried B．trying C．to try D．tried

(4)________how to do the homework, I went to ask my teacher for help.

　A．Not to know B．Not knowing C．Knowing not D．Not known

V、单元语法：宾语从句和表语从句

用宾语从句或表语从句完成下列句子