Answer:
1. C. they could not write on ordinary paper.
2. A. the Biro brothers‟ original patent was out of date
3. D. 1945
Explanation:
According to the excerpt from "The history of the biro", the development of the biro is narrated as Lewis Watermark secured the patent for the fountain pen in 1884. However, the problem with the ballpoint pens invented between 1888 and 1935 was that they couldn't write on ordinary paper ait tore through paper.
In June 1945, Milton Reynolds stumbled on the Biro pen in Argentina where he found out that the Biro brother's patent had expired when he sent some pens to Chicago.
The first biro factory began production on October 6, 1945.
Jeff needs 6 10th size strips. This is because 3/5 converts to 6/10.
This sentence is classified as a command, informal, and plural.
<h3>How to classify this sentence?</h3>
To classify this sentence we must look at several characteristics.
If we want to know if it is singular or plural, we look at the verb. In this case, he is addressing several people, so it is inferred that it is plural.
If we want to know if it is formal or informal, we must look if it contains formal words or expressions of formality. In this case, because it is an exclamation, it cannot be considered formal, so it is informal.
Finally, we notice that it has exclamation marks so we can infer that it is a command.
Learn more about exclamation in: brainly.com/question/423179
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