Books are made _______ paper while paper is mainly made _______ wood.A. of; of B. from; from C. of; from
—What’s your favorite ________? —Summer. Because I can swim in rivers.
David usually takes _______ walk for an hour after dinner.
The population of the world still now.
— Excuse me. Is the library open all day? —. Only from 8 a.m. to 4 p.m..
Keep off the drugs(毒品), you and your family will be in great danger?