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Bob is very strong. He knocked Tom out yesterday.
鲍勃很强壮，他昨天把汤姆打昏过去了。
（4）与off连用时有一些非凡的含义。一般用于口语。
A vt.（价格上）减去，除去，打折扣：
They knocked five dollars off the price of the coat.
他们把这件上衣的价格降低了5美元。
B vi. 下班，停止，中断（工作等）：
When do you usually knock off?
你一般什么时候下班？
He knocked off for lunch at half past eleven.
他11点半休息吃中午饭。
2．call
（1）vt., vi. 叫，喊：
I heard someone calling.
我听见有人在喊叫。
（2）vt. 呼唤，召唤：
Lucy is sick. Please call a doctor.
露西病了。请去叫个医生来。
（3）vi. 访问，拜访；（车、船等）停靠：
Amy called(at our house) yesterday.
艾米昨天来（我们家）了。
I have just called on Mr. Frith.
我刚刚去看望过弗里斯先生。
The train calls at large stations only.
这列火车只停大站。
练习答案 Key to written exercises
1．要害句型练习答案
A Some meat, a desk, some tobacco, a tin of beans, a comb, acity, a/ some cloth, some oil, a bottle of beer, a day, a word, a student, some sugar, some rain, an orange, a/ some rubber
D (sample answers)
1 I found an old coin in the garden.
2 I put some sugar in my tea.
3 I cut some wood for a/ the fire.
4 I bought a newspaper yesterday.
5 I made some coffee.
6 I like the curtains in this room.
2．难点练习答案
A 1 out 2 over 3 off 4 at
B 1 knocked him out
2 knock off
3 knocked 20% off the price
3．多项选择题答案
1 d 2 a 3 c 4 d 5 d 6 a
7 d 8 a 9 b 10 a 11d 12 a
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