Choose the correct passive form of the following active sentence : My friend kept me waiting.

1.The books shop sells no books ¾ Bangla, French and English.

2.The emergency exit was concealed ¾ a red curtain.

3.Audience are attracted by ¾ advertisement and tend to buy the product blindly.

4.The expression 'in $defiance^{\prime} means$ ¾

5.Its main purpose is $\to get you excited about science by doing it rather than simply learning about$ it. What does '$it^{\prime} refer \to$?

6.In everyday life, ¾ is not considered a polite expression.

7.Change into indirect narration : I say to him, "Please don't repeat the mistake."

8.Which of the following sentences has an adverb in it?

9.Use the appropriate form of verb : The town where I live is very different now. It (change) a lot

10.The noun form of the word '$waste^{\prime} is$ ¾

11.The synonym of the word '$social^{\prime} is$ ¾

12.Find the correct sentence.