Вставьте артикль, где необходимо.
1. are you busy? are you busy ma 2. she isn't old lady. she is slim and lovely. 3. it's convenient, isn't it? let's take bus. 4. london is old city. it is big nice city. 5. let me have cup of tea, please. my tea is cold. 6. let's have snack in cafe. 7. phone me please. i am in my lab. 8. he is cold. let him take coat. 9. anna is doctor. she is good doctor. 10. mike'sboat is old. it is old blackboat. 11. her mistake is bad. it'sbad mistake, isn't it? 12. keep my book, please. it's interesting book. 13. it's such simple plan.

1. Are you busy? Are you busy now?
Explanation: The appropriate article to use in this sentence is "now" because it refers to the current moment and specifies when the person is busy.

2. She isn't an old lady. She is slim and lovely.
Explanation: The appropriate article to use in this sentence is "an" because the noun "lady" starts with a vowel sound. The indefinite article "an" is used before nouns that start with a vowel sound.

3. It's convenient, isn't it? Let's take the bus.
Explanation: The appropriate article to use in this sentence is "the" because it refers to a specific bus, the means of transportation being discussed.

4. London is an old city. It is a big and nice city.
Explanation: The appropriate articles to use in this sentence are "an" and "a" because they refer to London as a specific city and describe its characteristics as an old, big, and nice city.

5. Let me have a cup of tea, please. My tea is cold.
Explanation: The appropriate article to use in this sentence is "a" because it refers to a single cup of tea. The indefinite article "a" is used before nouns that are singular and not specific.

6. Let's have a snack in the cafe.
Explanation: The appropriate article to use in this sentence is "the" because it refers to a specific cafe that the speaker has in mind.

7. Phone me, please. I am in my lab.
Explanation: No article is needed in this sentence because the noun "lab" is a specific place mentioned by the speaker.

8. He is cold. Let him take his coat.
Explanation: The appropriate article to use in this sentence is "his" because it shows possession, indicating that the coat belongs to him.

9. Anna is a doctor. She is a good doctor.
Explanation: The appropriate article to use in this sentence is "a" because it refers to Anna as a specific doctor. The indefinite article "a" is used before nouns that are singular and not specific.

10. Mike's boat is an old boat. It is an old black boat.
Explanation: The appropriate articles to use in this sentence are "an" and "an" because they refer to Mike's boat as a specific object and describe its characteristics as being old and black.

11. Her mistake is bad. It's a bad mistake, isn't it?
Explanation: The appropriate article to use in this sentence is "a" because it refers to the mistake as a specific noun. The indefinite article "a" is used before nouns that are singular and not specific.

12. Keep my book, please. It's an interesting book.
Explanation: The appropriate article to use in this sentence is "an" because it refers to the book as a specific object and describes its characteristic as being interesting.

13. It's such a simple plan.
Explanation: The appropriate article to use in this sentence is "a" because it refers to the plan as a specific noun. The indefinite article "a" is used before nouns that are singular and not specific.