1. use articles where necessary:

1 february is… shortest month of… year. 2. he read… story from… beginning to… end. 3. new year begins on… east of. january. 4. she is in. 1 oth year at… school and her brother. is… 3d year student at… university. 5… number 10, downing street is residence of… british prime minister. 6… fish is more useful than… meat. 7. don't drink… milk, it is very cold. 8… water in. river is quite warm this summer. 9.it cost her hundred and .fifty pounds. 10.i take. coffee with… sugar.

1. February is the shortest month of the year.
Explanation: We use the article "the" before "shortest month" because we are referring to a specific month, which is February.

2. He read a story from the beginning to the end.
Explanation: We use the indefinite article "a" before "story" because it is not a specific story.

3. The new year begins on the east of January.
Explanation: We do not use an article before "east" because it is not referring to a specific east, but rather a general direction.

4. She is in the 10th year at the school and her brother is a 3rd year student at the university.
Explanation: We use the definite article "the" before "10th year" because it refers to a specific year at the school. However, we use the indefinite article "a" before "3rd year student" because it is not referring to a specific student.

5. Number 10, Downing Street is the residence of the British Prime Minister.
Explanation: We use the definite article "the" before "residence" because it is referring to a specific residence, which is Number 10, Downing Street, the official residence of the British Prime Minister.

6. Fish is more useful than meat.
Explanation: We do not use articles before "fish" and "meat" in this sentence because they are used in a general sense.

7. Don't drink the milk, it is very cold.
Explanation: We use the definite article "the" before "milk" because it refers to a specific milk.

8. The water in the river is quite warm this summer.
Explanation: We use the definite article "the" before "water" and "river" because they refer to specific water and river.

9. It cost her a hundred and fifty pounds.
Explanation: We use the indefinite article "a" before "hundred and fifty pounds" because it is not a specific amount.

10. I take coffee with sugar.
Explanation: We do not use an article before "coffee" and "sugar" in this sentence because they are used in a general sense.