And in that way it has been proved that the ...

[ Grammar ]

And in that way it has been proved that the radioactive elements are constantly ______ and that they produce at the end ordinary elements, principally helium and lead.

A. disintegrating

B. to disintegrate

C. being disintegrating

D. disintegrated

Select your answer:
A B C D E

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Vocabulary and Grammar › View

Over time, the technology is ____________ and adopted by other countries.

A. profused

B. recollected

C. diffused

D. dissoluted

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Multiple Choice: Choose the correct sentence.

A. She has been reading that book all day.

B. She have been reading that book all day.

C. She has read that book all day.

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________ are the laptops going to be kept?

A. We’re
B. Were
C. Where

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Choose the sentence with the correct placement of commas.

A. How do I turn on this computer, Mr. Thomas?

B. How do I, turn on this computer Mr. Thomas?

C. How do I turn on this computer Mr. Thomas?