Task 2
1. your friends won't be late.
a) won't they b) isn't it c)will they d) is it
2. helen told the boys to leave the dog.
a) along b) alone c) itself d) apart
_must pay the admission fee.
a) everyone who doesn't have a free ticket
b) no one who doesn't have a free ticket
c) no one who has free tickets
d) any one who has free tickets
4. when i last saw them, the police the robbers down columbus street.
a) were chasing b) chased c)was chasing d) were on a chase
5. oranges are a source of vitamin c.
a) well b) good c)better d) very
6. most of the older civilizations which flourished during the fifth century b.c.
a) they have died out b)has died out chave died out d)they had died out
9. metallic paints are used to paint bridges,
a) isn't it? b) don't they? c) isn't it so? d) aren't they?
10. the neil armstrong on the moon was a momentous event in the history of mankind.
a) first b) landing c)walking d) landing of
b)landing
c) walking
d) landing of

Task 2:
1. your friends won't be late.
a) won't they
b) isn't it
c) will they
d) is it

The correct answer is c) will they. In this question, we are using the negative form "won't" to express that your friends will not be late. When we want to transform a negative sentence into a question, we use the auxiliary verb "will" before the subject "they". So the correct question tag is "will they".

2. Helen told the boys to leave the dog.
a) along
b) alone
c) itself
d) apart

The correct answer is b) alone. In this sentence, Helen asks the boys to leave the dog by itself. "Alone" means without anyone else and it is the correct word choice in this context.

3. __must pay the admission fee.
a) everyone who doesn't have a free ticket
b) no one who doesn't have a free ticket
c) no one who has free tickets
d) any one who has free tickets

The correct answer is b) no one who doesn't have a free ticket. In this sentence, it is implied that those who don't have a free ticket must pay the admission fee. The word "no one" indicates the absence of people who do not have a free ticket.

4. When I last saw them, the police __ the robbers down Columbus street.
a) were chasing
b) chased
c) was chasing
d) were on a chase

The correct answer is a) were chasing. In this sentence, we are referring to an action that was happening in the past. The verb "to chase" should be in the past continuous tense, which is "were chasing".

5. Oranges are a source of vitamin C.
a) well
b) good
c) better
d) very

The correct answer is d) very. In this sentence, we want to emphasize that oranges are an excellent source of vitamin C. The word "very" is used to intensify the meaning and emphasize the strength of the statement.

6. Most of the older civilizations which flourished during the fifth century B.C. __.
a) they have died out
b) has died out
c) have died out
d) they had died out

The correct answer is c) have died out. In this sentence, we are talking about older civilizations that no longer exist. The correct verb form to use here is the present perfect tense, as it indicates an action that happened in the past but has relevance to the present.

7. Metallic paints are used to paint bridges, __?
a) isn't it?
b) don't they?
c) isn't it so?
d) aren't they?

The correct answer is d) aren't they? In this sentence, we are asking a question to confirm a statement. The pronoun "they" refers to the metallic paints, and the correct question tag to use here is "aren't they?".

8. The Neil Armstrong on the moon was a momentous event in the history of mankind.
a) first
b) landing
c) walking
d) landing of

The correct answer is d) landing of. In this sentence, we are referring to the event of Neil Armstrong landing on the moon. The correct phrase to use here is "landing of" to indicate the action of landing.

I hope this detailed explanation helps you understand the correct answers! Let me know if you have any further questions.