Knock off vs. knock up?

[ab]

English Grammar Tests, Elementary Level

ESL/EFL Test #84 "ESL Prepositions", question 3

I have some material from which I could knock ......... an article if you want me to.

(a) up
(b) down
(c) together
(d) off

English Grammar Tests, Elementary Level

ESL/EFL Test #84 "ESL Prepositions", answer 3

I have some material from which I could knock up an article if you want me to.

Correct answer: (a) up

Your answer was: incorrect
I have some material from which I could knock off an article if you want me to.
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HI,

why is "off" wrong here?
thanks

ab

[Vangelic1]

Traditionally, "knock up" means to get someone pregnant.

"Knock off" has two meanings. The first is to kill someone.
The second is to steal or make an illegal copy (usually of a product that will be sold as if it is the original). For example, "Clyde knocked off a store, but got caught a week later when the police saw a video tape of the robbery." Or, "I bought a Louis Vitton knock off yesterday. It looks just like the real thing!"

This question is based on the second use of "knock off" it means that the person is going to steal or illegally copy the article.

[Torsten]

Hi Venus, many thanks for joining our community. It's good to have you here and I'm sure we can exchange ideas and experiences.

Regards
Torsten
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Vangelic1]

Thanks for the welcome, Tortsen. I think this is good practice for me as a writer.

[Sunchild]

I'd just like to point out that while 'knock off' can mean to rob or steal (He knocked off a bank.), items that are 'knock off' or 'knocked off' aren't always illegally copied or stolen. They are just imitations of a brand.

[Alan]

Hi,

Knock up has the sense of making/creating something without much preparation. It is often used in the preparation of food - meals as in:

It won't take me long to knock up a meal for you both - I've got several ingredients left over from yesterday.


Alan
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English as a Second Language
You can read my ESL story Make or Do?

[Seeemilywrite]

While knock up is the correct answer i wouldnt use it while you are out and about in socity, people are likely to look at you oddly.

[Alan]

Hi seeemilywrite,

I'm intrigued by your comment. If you restricted your speech in conversation fearing that another person might read into your words meanings other than the ones you intended, where would you be?

Alan
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English as a Foreign Language
You can read my EFL story Communicating with you?

[Frank Stern]

Only one observartion. The system give me the next result:
"correct sentence:
I have some material from which I could knock off an article if you want me to.

Correct answer: (a) off

Your answer was: incorrect
your sentence:
I have some material from which I could knock up an article if you want me to."
However I was correct because as the system says I selected "knock up" which we is actually the correct answer. Therefore a small modification should be done to your computer program. Regards

[Torsten]

Hi Frank,

Many thanks for your message. We'll make the changes soon. Best regards, Torsten

[Duset]

So, which variant is right?