Correct the given sentence gramatically.

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

In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best expresses the same sentence in Indirect/Direct speech.

The teacher said to the students, "Work hard now if you wish to have a better future."

Improve the bracketed part of the sentence.
Higher crude oil prices have doubtlessly provided a significant fiscal boost in the past several months, although any (flair on) going forward can lead to a price spiral
that would have other untoward consequences as well.

Improve the bracketed part of the sentence.
The communities of ants are sometimes very large, (numbered) even upto 500 individuals: and it is a lesson to us that no one has ever yet seen quarrel between
any two ants belonging to the same community.

Improve the bracketed part of the sentence.

The feminist criticism (has become) a political discourse; a critical and theoretical practice committed to the struggle against patriarchy and sexism.

Improve the bracketed part of the sentence.
In the eighteenth century, Japan's feudal overlords, from the shogun to the humblest samurai, found themselves (on) financial stress.

Improve the bracketed part of the sentence.

Woodrow Wilson was referring to the liberal idea of the economic market when he said that the free enterprise system is the (much) efficient economic system.

Improve the bracketed part of the sentence.

Our biological knowledge of even some of the commonest animals is (embarrassed) slight and it is here that zoos can be of inestimable value in amassing information.

Improve the bracketed part of the sentence.
The student of human history can draw on many more natural experiments (than) just comparisons among the five inhabited continents.