Перевод плз правильно​

1) be quiet! the performance has already begun 2) i was going to leave the room when i just heard the telephone ring. 3) he has just heard her sing. 4) they have already divided the work. 5) my cousin has joined greenpeace recently.

1.you are a highly qualited engineer _ ?   c)aren't you     2.there are _ computers next to manager's desk c)-       earth is round,we all know that b)the