_____ Peter and Jim _____ hamburgers?

Miss Wang, I went to your office at 11:45 yesterday morning ,but you weren’t in. — I _____with a student in the classroom at that time.

It will _______ hundreds of years to make robots think like a human.

The 3-month-old baby cried from time to time last night. His parentshad a good sleep.

Only when _____ possible to settle the problem how to get the machine repaired.