We don’t doubt _____ he can do a good job, concerning his experience.

You needn’t introduce him to me. I’ve met him on several _____.

I advise them to withdraw （ ）.

No sooner had he sat down to lunch （ ） there was a knock at the door.

The defense computers calculate way to （ ） the enemy missiles.

Fresh air, enough exercise and nutritious food （ ） to good health.

I stayed up all night _____ to find a new solution to the problem.

It is very expensive to （ ） the fashion.

Three of us will go there, and the rest （ ） to stay here.

My children are looking forward to （ ） a trip to Paris.

We don’t doubt _____ he can do a good job， concerning his experience.

（ ） we have all the materials ready, we should begin the new task at once.