Which word is misspelled?

1.What is the new development in the history of man?

2.The word '$radiation^{\prime} is -$

3.Choose the right tense : My friend¾ before I came.

4.Which sentence is correct?

5.Choose the right alternative : If I were you, I ¾ that dress. It's too expensive.

6.Choose the most appropriate preposition : We walked ¾the \end{of}the road.

7.What does the following idiom means? He was always pulling my leg.

8.Choose the appropriate verb form : The rain ceased and the birds ¾ to sing.

9.The passive form of 'The storm damaged the banyan $tree^{\prime} is -$

10.'At the eleventh $hour^{\prime} means -$

11.The exams were drawing near? The word '$near^{\prime} is -$

12.Indentify the correct passive form : He is going to open a shop.