Unlike many other boys of his age who are often addicted to PC games, he is _______ on outdoor activities in the mountains.
.—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.
—How does the Internet ____us?—By sharing information free of charge.