The more one is ______ the English-speaking environment, the better he or she will learn the language.
Medicine should be placed ____children's reach to make sure of safety.
.—I finished all my work today. —If____, you can help others with their work.
I would rather you ____with us yesterday, but you left.
.There has been a(n)____of sadness in the small town since a boy was drowned in the river.
—Dear, you water the garden and I do the cooking.