【题目】选出每组中不同类的一项。
(____) 1. A. first B. fortyC. second
(____) 2. A. art room B. playground C. music room
(____) 3. A. library B. class C. computer room
(____) 4. A. where B. on C. under
(____) 5. A. classroom B. floor C. office
【答案】1. B 2. B 3. B 4. A 5. B
【解析】
略