Preferable sentence

Which one of the following sentences is preferable? A) Each person did their work quietly. B) Everyone did their work quietly. C) Everyone did his work quietly. D) Everyone worked quietly. MY ANSWER WOULD BE D) AM I CORRECT?

Grammar

The report of accounts __ been completed, and the supply of tablets ___ low. A) has are B) has is C) have are D) have is My answer would be: A. Reasoning: it is one report (single) and more than one tablet (plural) Am I correct?

Subject verb agreement

Which one of the following sentences does not illustrate subject-verb agreement? A) Each of the players need a locker. B) He said that the computer is broken. C) There go the members of the cast. D) We knew that rivers flow south. In my opinion, it should be C. Am I correct?

grammar

The man ___ you should marry is the one ___ gave me the portfolio. a) who who b) whom whom c) whom who d) who whom I think it should be c, am I correct?

grammar

We thought it was ___ should go. a) he whom b) him whom c) he who d) him whom Is it a?