Correct the given sentence gramatically.

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

A sentence has been given in Direct/Indirect Speech. Out of the four given alternatives, select the one which best expresses the same sentence in Indirect/Direct Speech
 
The lawyer said to them, “Call the witness."

A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.
 
The teacher should check the homework

Rearrange the parts of the sentence in correct order.
 
The whole biosphere, like
 
P : a chemically dynamic state
Q : the individual organisms that
R : live inside it, exists in

In the following question, out of the given four alternatives, select the one which is opposite in meaning of the given word.
 
Objective

In the following question, out of the given four alternatives, select the one which is opposite in meaning of the given word

Guile

In the following question, out of the given four alternatives, select the one which best expresses the meaning of the given word.

Austerity

In the following question, out of the given four alternatives, select the one which best expresses the meaning of the given word

Empirical

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.
 
Many lost dogs ______ been given back to their owners