<span>The question says,'before you use one of the encyclopedias, check .......... its copyright date'. The correct option is A. This is because, the statement is referring to only one of the encyclopedias, and the correct possessive noun for an inanimate object like encyclopedia is it's. 'Their' will only be correct if the statement is referring to all the encyclopedias.</span>
Here's an attachment with the answer key to all of your questions.
Answer:
Prepositional I would like to do the pharases
Answer:
(especially of an old person) bad-tempered and negative.it is the answer of first question
answer of b. is Word hippo - Thesaurus