Choose the word for blank 3. (Public libraries)

Public libraries are not only places to borrow books. Many now offer free internet access, classes for adults and activities ___1___ children. The staff are always ready to help ___2___ you cannot find a book. Some libraries even lend tools, games and musical instruments. As a result, libraries ___3___ more and more popular with people of all ages. If you have never joined one, it is ___4___ time you ___5___ one.

Answer and explanation

Correct answer: D. are becoming

  1. Step 1: 'More and more' goes with a continuous present describing a trend.
Answer
are becoming.
Why not the others: became, had become and will have become don't fit.

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