16. —I think you’d better improve your writing before Mr. Smith grades it.
—Oh, dear! _______
A. Who cares? B. You’re welcome.
C. I don’t mind at all. D. Is it as bad as that?
17. Villagers along the coast depend on the fishing industry, _______ there won’t be much work.
A. where B. that C. by which D. without which
