Определите, в каком случае глагол to have является вс для образования формы Perfect.
1.We have many laboratory tests this year. 2.We have made many laboratory tests this year. 3.We have
to make many laboratory tests this year. 4. Old automobiles had no convenience (удобства) for drivers.
5.He had already finished his experiment when we came. 6. He had to repeat his experiment once more
last week.