Firms that use computers have found that the number of staff _____ is needed for quality control can be greatly reduced.

Sales director is a position ______ communication ability is just as important as sales

Susan may have missed her train, in _______ case she won’t arrive for another hour.

The number of people ________ this happens is not very large.

This is the best way ______ I have thought of ______ the problem.

There are many good stories about the Long March, _________this is the most instructive.

I’ve never seen such an interesting film  we saw last night.

Wind power is an ancient source of energy        we may return in the near future.

Pointing to the house on ____ roof grew lots of bush, the old man told me that was where I would stay.

There are cases _____ the word “school”is used as a verb(动词).