Question

8. It has sold millions of copies worldwide (Change the Voice)
1)Millions of copies have been sold worldwide by it.
2)O Millions of copies were sold worldwide by it.​

Answer 1

1. The given sentence is compound and will be changed to a simple sentence. To do that, one of the clauses need to be reduced to a word or a phrase. The clause "It has sold millions of copies world wide" will be reduced to a phrase "Having sold millions of copies world wide".

So, the answer is:

Having sold millions of copies world wide, it has been been translated into more than 40 languages.

2. The given sentence will be followed by a question tag. The question tag is formed using the auxiliary verb and the subject (or the pronoun that represents the subject). When the sentence is positive, the tag is negative and vice versa.

Since this sentence has only one verb ('became' is the main verb), the auxiliary verb is implied 'did' (did become). Also, the pronoun 'it' will be used to represent the subject 'book'. Hence the question tag formed is 'didn't it'.

So, the answer is:

The short informative book became an account of cosmology, didn't it?

Answer 2

In the above question

1 is the correct answer