网址：http://m.1010jiajiao.com/timu3_id_2631089[举报]
— Is this a key? — ________ .
A. No, it isn’t. B. It’s a ruler C. Yes, it’s D. OK
[ ]
---- Is this a key?
---- ________ .
Is this your key? - ______
A. No, it isn’t. B. It’s a ruler. C. Yes, it’s. D. OK.