—The dictionary is a useful _______ for understanding new words.—I think so.A. secret B. tool C. way
I find___________hard to learn English well.
--Mr.Black used to be a worker,_________? --Yes,he_______. Now he is a policeman.
–Could you please tell me__________? --He is under the big tree over there.
I like these photos and they can________me________the life living in America.
He wasn’t able to arrive on time__________the heavy snow.