She now has to return home to have a long-time rest at her young age, because her health _____ under the great pressure of work.
If you had finished your homework yesterday, you _____ home now.
_____ doesn’t seem to have been any trouble in solving the problem.
Is it in the factory ______ you visited last week ______ this kind of car is made?
________ that I was a regular visitor, the servant let me in.
David and Jack, _____so much alike each other, were often considered _____ twin brothers.