Which one of the following is the correct meaning of -
 That which cannot be heard.

Choose the correct option:
 When we begin a letter with 'Dear Sir' or 'Dear Madam' or 'Dear Sir/Madam', we end it with____

Choose the correct option changing the following sentence intoas sertive:
 How childish your talks are!

Choose the correct transformation from assertive to exclamatory:
I wish I knew more people.

Choose the correct option:
 The language in a tender should be

Which of the following structures of a question is correct? 

Select the correct direct form of the given sentence.
 She asked me why I had been smoking that day.

Choose the appropriate article given in the options:
 Copper is _______ useful metal.