They ___ TV at the moment. a. are watch b. are watching c. is watching d. watching e. am watching f. watches

The correct answer is b. are watching. 'They' is a plural pronoun, so it takes the plural form of the verb 'to be', which is 'are'. Since the action is happening 'at the moment', we need to use the present continuous tense, which is formed with 'are' + the verb + '-ing'.