选择合适的答语。 A. It's D. B. Nice to meet you, too. C. It's brown. D. I have three. E. My pencil box is green. 1.—What colour is it? —________ 2.—What's this? —________ 3.—Nice to meet you. —________ 4.—How many rulers do you have? —________ 5.—What colour is your pencil box? —________