$1$. If there aren't any tickets left when we reach the front of the queue, we will have waited all the time for nothing.

$2$. I haven't decided yet about whether to buy a new car or second hand one. But I am thinking about it

$3$. There are any errors, let me know.

$4$. We have just got to the top in time.The sun will rise in a minute.

$5$. By midnight he will have been unconscious for forty-eight hours.

$6$. It can't have been Anna who cooked that food.She was out all day yesterday.

$7$. It is highly desirable that from every product in regular production, samples are withdrawn periodically.

$8$. The portrait is widely known to have been painted by an Italian.

$9$. Can you keep calm for a moment? You are always making noise in class

$10$. You visited Aunt Mary while you were in Paris.

1. will have waited

2. am thinking

3. are

4. will rise

5. will have been

6. can't have been

7. are withdrawn

8. to have been painted

9. are always making

10. did you visit