EX3: CHOOSE THE CORRECT VERB FORM

Life without computers (seems/ has seemed) simply impossible now.

Along with computers, the Internet (aids/ has aided) the developments in technology

Since the time computers (were/ have been) invented, they (encouraged/ have encouraged) great progress in different fields

However, many people argue that computers (killed/ have killed) physical contact between people.

For example, teenagers now (prefer/ have preferred) chatting on the computer to meeting face to face.

Computers (affected/ have affected) every aspect of our lives