If it is dark,the lights, please.

of great importance _______ parents say and do in family life, which may have a life-long effect on their children.

Will you ________ our house while we are out on holiday? —Well, that ought to be no problem.

.Most business letters and governmentreports are the main situations _________ formal language is used. ^*

How about going hiking this weekend—Sorry, I prefer _____rather than _____.