Correct the given sentence gramatically.

Shreya, who she is my best friend, is a singer.

A sentence/a part of the sentence is underlined. Four alternatives are given to the underlined part which will improve the sentence. Choose the correct alternative and click the button corresponding to it. In case no improvement is needed, click the button corresponding to "No improvement".

He enjoys to go on tours with his children.

Out of the four alternatives, choose the one which can be substituted for the given words/sentences and click the button corresponding to it.
The scientific study of elections

Out of the four alternatives, choose the one which can be substituted for the given words/sentences and click the button corresponding to it.
Thing that can be felt or touched

Out of the four alternatives, choose the one which can be substituted for the given words/sentences and click the button corresponding to it.
One who copies from other writers

In each of the questions, four alternatives are given for the Idiom/Phrase. Choose the alternative which best expresses the meaning of the Idiom/Phrase
and click the button corresponding to it.
Turned down

In each of the questions, four alternatives are given for the Idiom/Phrase. Choose the alternative which best expresses the meaning of the Idiom/Phrase and click the button corresponding to it.

Carry the ball

In each of the questions, four alternatives are given for the Idiom/Phrase. Choose the alternative which best expresses the meaning of the Idiom/Phrase and click the button corresponding to it.
Couch potato

The sentences given with blanks are to be filled with an appropriate word(s). Four alternatives are suggested for each question. For each question, choose the correct alternative and click the button corresponding to it.
Sushma has a deep _____ for drunkards.