ВСТАВИТЬ АРТИКЛИ Though you can make ____ decision on purely economic grounds, buying ____ computer...

Конечно, вот текст с добавленными артиклями:

Though you can make a decision on purely economic grounds, buying a computer is often more like joining a religious cult. Buy an Apple, for example, and almost by default you join Apple chairman Steve Jobs in his crusade against IBM. Every machine has its "users' groups" and a band of loyal enthusiasts who tout its merits. That makes it all the more difficult for the uninitiated to decide what machine to buy. Students have a huge advantage, however. The computer companies are so eager for students' business (it builds "brand loyalty") that many offer huge discounts.

In the past six months, IBM, Apple, and others have brought out new computers, and the fierce competition has forced prices down. Also, time is on your side: next year at the time you'll have even more choice and more computing power and features for the same price. On the other hand, this will probably be true for many years. So for those who need or want a computer now, it's a great time to buy one.

Вот текст с правильными артиклями (объяснение выбора артиклей ниже):

Though you can make a decision on purely economic grounds, buying a computer is often more like joining a religious cult. Buy an Apple, for example, and almost by default you join Apple chairman Steve Jobs in his crusade against IBM. Every machine has its "users' groups" and a band of loyal enthusiasts who tout its merits. That makes it all the more difficult for the uninitiated to decide what machine to buy. Students have a huge advantage, however. The computer companies are so eager for students' business (it builds "brand loyalty") that many offer huge discounts.

In the past six months, IBM, Apple, and others have brought out new computers, and the fierce competition has forced prices down. Also, time is on your side: next year at this time you'll have even more choice and more computing power and features for the same price. On the other hand, this will probably be true for many years. So for those who need or want a computer now, it's a great time to buy one.

Объяснение выбора артиклей:

1. a decision – неопределённый артикль "a", так как говорим о "решении" в общем смысле, не о конкретном.
2. a computer – неопределённый артикль "a", потому что упоминаем компьютер впервые.
3. a religious cult – аналогично, упоминаем культ впервые; он пока неопределённый.
4. an Apple – перед словом, начинающимся с гласного звука ("Apple"), употребляется форма "an".
5. a band of loyal enthusiasts – здесь тоже неопределённый артикль, так как речь идёт о группе, упомянутой впервые.
6. the more difficult – устойчивое выражение "the + сравнительная степень", указывает на степень сложности.
7. the uninitiated – определённый артикль "the", потому что речь идёт о конкретной группе людей (непосвящённых).
8. a huge advantage – неопределённый артикль "a", так как преимущество упоминается впервые.
9. the fierce competition – определённый артикль "the", так как конкуренция уже конкретизирована (между IBM, Apple и другими).
10. this time – указательное местоимение "this", так как речь идёт о конкретном моменте времени (через год от текущего времени).
11. the same price – устойчивое выражение "the same", всегда используется с определённым артиклем.
12. the other hand – устойчивое выражение "on the other hand", всегда употребляется с определённым артиклем.
13. a computer – неопределённый артикль "a", так как речь в целом о компьютере, который кто-то хочет или нуждается.

Артикли работают как маркеры, указывающие на конкретность, новизну или общий характер упоминаемого объекта.

Though you can make a decision on purely economic grounds, buying a computer is often more like joining a religious cult. Buy an Apple, for example, and almost by default you join Apple chairman Steve Jobs in his crusade against IBM. Every machine has its "users' groups" and a band of loyal enthusiasts who tout its merits. That makes it all the more difficult for the uninitiated to decide what machine to buy. Students have a huge advantage, however. The computer companies are so eager for students' business (it builds "brand loyalty") that many offer huge discounts.

In the past six months, IBM, Apple, and others have brought out new computers, and the fierce competition has forced prices down. Also, time is on your side: next year at this time you'll have even more choice and more computing power and features for the same price. On the other hand, this will probably be true for many years. So for those who need or want a computer now, it's a great time to buy one.