What kind of mistakes do you want to avoid ____full marks in your test?

There is a great deal of evidence        that music activities engage different parts of the brain .

Particular attention must be paid ______ welfare, especially in the poor area.

— What made your skin look so terrible? — _______ to the sunlight for a long time. 

I apologized for ____ to tell you when and where the meeting will be held in advance. ----That’s all right.