Réponse:
Questions :
I have used several search engines.
Answer : Have you used several search engines?
Larry and Sergey haven't finished their degrees.
Answer : Haven't Larry and Serguey finished their degrees ?
They have made a lot of money.
Answer : Have they made a lot of money ?
Sergey has been hired in the U.S. for many years.
Answer : Has Sergey been hired in the U.S for many years.
Larry and Sergey have hired many people to work for google.
Answer : Have Larry and Serguey hired many people to work for google ?
We have used the computer lab several times this semester.
Answer : Have we used the computer lab several times this semester ?
The memory and speed of computers have increased.
Answer : Have the memory and speed of
computers increased ?
Computers have become part of our daily lives.
Answer : Have computers become part of our daily lives ?
Brin and Page have become billionaires.
Answer : Have Brin and Page become billionaires ?
