Câu hỏi:

22/05/2022 509

Read the following passage and answer the questions

Ballpoint pen is a pen that has, as its name says, ball at its point which rotates when dragged across the writing surface and leaves behind ink that comes from the reservoir of the pen. Ball at the point can be of different diameter and can be made of brass, steel, or tungsten carbide. It is today the most widespread writing instrument and has literally changed the way we write.

   Trying to invent a pen which can write on leather, a tanner John J. Loud invented the first ballpoint pen and patented it in 1888 in America. This pen had a small steel ball which was placed so it could not fall out nor fall in but it still could rotate freely. This invention was not commercially viable and could not be used for writing. Because of that patent lapsed in time.

Was this invention commercially viable?

Trả lời:

verified Giải bởi Vietjack

Đáp án là: No, it wasn’t.

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

Choose the best answer A, B, C or D to complete the following sentences.

The students are playing ____________ in the school yard.

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Câu 2:

Give the correct form of the verbs in the blanket

She told me (give) __________ you this dictionary.

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Câu 3:

Give the correct form of the verbs in the blanket

It’s too cold outside. Would you mind (close) __________ the window?

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Câu 4:

Choose the best answer A, B, C or D to complete the following sentences.

He ____________ five gold medals since the beginning of the Sea Games.

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Câu 5:

Give the correct form of the verbs in the blanket

When passing Truong Tien Bridge, tourists often stop (take) __________ pictures.

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Câu 6:

Complete the second sentence so that it has the same meaning to the first

They decorated their house for the Tet holiday last weekend.

Their house________

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Câu 7:

Complete the second sentence so that it has the same meaning to the first

“Is Ha Long Bay a wonder of the world?” Ann said to me.

Ann asked_________

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Câu 8:

Give the correct form of the verbs in the blanket

My friend suggested (go) __________ by bus.

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Câu 9:

Complete the second sentence so that it has the same meaning to the first

Do you mind if I go out with my friends at night?

Would you mind if ________

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Câu 10:

Choose the best answer A, B, C or D to complete the following sentences.

The old lady sat in a corner talking to ____________

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Câu 11:

Complete the second sentence so that it has the same meaning to the first

Let’s go shopping.

Why don’t we ________?

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Câu 12:

Choose the best answer A, B, C or D to complete the following sentences.

What’s ____________ film you’ve ever seen?

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Câu 13:

Choose the best answer A, B, C or D to complete the following sentences.

The exam was quite ____________ we expected.

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Câu 14:

Choose the best answer A, B, C or D to complete the following sentences.

The teacher told the students ____________ at 8 o’clock.

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Câu 15:

Choose the best answer A, B, C or D to complete the following sentences.

I’m hungry. ____________ is for dinner this evening?

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