1) listen! somebody a lovely song. a. are singing b. sing c. sings d. is singing 2) we tom for ages. a.has not seen b.haven't saw c.are not seeing d. haven't seen 3) don't call me at 6 o'clock this evening. i my homework. a. will have done b. do c. will do d. will be doing 4) they are waiting for a bus. the bus hasn't arrived yet. a. since b. yet c. still d.already 5)tour operators a.packaged tours b. packagings c.packing tours 6) before he went to london he had read tons of books to visit as many sights as possible. a.adventure b. complaint c. children's

1) Listen! Somebody ___ a lovely song. d. is singing
2) We ___ Tom for ages. d. haven't seen
3) Don't call me at 6 o'clock this evening. I ___ my homework. d. will be doing
4) They are ___ waiting for a bus. The bus hasn't arrived yet. c. still
5)Tour operators sell___.  a.packaged tours
6) Before he went to London he had read tons of ___ books to visit as many sights as possible.
a.adventure b. complaint c. children's - здесь ничего подходящего нет

1) The correct answer is "is singing". This is the present continuous tense, used to describe an action happening at the moment of speaking. The verb "listen" tells us that the action is happening now, so we use the present continuous.

2) The correct answer is "haven't seen". This is the present perfect tense, used to describe an action that started in the past and is still true in the present. The phrase "for ages" tells us that the action started in the past and is still continuing.

3) The correct answer is "will be doing". This is the future continuous tense, used to describe an ongoing action that will be happening at a specific time in the future. The phrase "this evening" tells us that the action will be happening at a specific time.

4) The correct answer is "yet". This adverb is used to indicate that a particular action or event has not happened or is not completed up to the present time. In this sentence, it is used to indicate that the bus has not arrived up to now.

5) The correct answer is "packaged tours". "Packaged tours" refers to pre-arranged tours that include transportation, accommodation, and other amenities. It is the correct term used in the tourism industry.

6) The correct answer is "children's". This is the possessive form of the noun "children", indicating that the books he read were specifically for children. The possessive form is used to indicate ownership or association.