The twins pretended to be each other because they made a huge mistake
Answer:
'Had Bought'
Explanation:
The infinitive 'to buy' turns into 'had bought' in past perfect. The PAST TENSE is simply 'bought', but the PAST PERFECT tense is 'had bought'.
New technologies have changed the whole world in scientific matters, social relationships, economy, health, nature, and we could go on with many more examples. One of the things that has been modified with this development is advertising. Now tech marketing is one of the main things to consider if you want to persuade people.
Actually, the classic way to advertise something has been left behind, after tech marketing and media.