--You know a lot about Chinese history, don’t you?--Yes, I ___________ China for a long time since 1998.
—How long has Henry’s father_______? —About two months.
—We should _______ humans from ________ down too many trees. —I agree with you. Trees are very important to us.
—Ihavenoidea____________ tell herthebadnews. —I think tomorrow is the best time.
—Neither Mary nor her friends _________ joined the music club because they have no time. — It’s a pity!
Mr. Li will go to Guangzhou by air. His workmates are ______ him off at the airport.