Unit 2 Room Lesson 3 同步练习一、单项选择1.------Where is your ruler?------It is____ the table.A.on B.at 2.------What color is your pen?------It is_____.A.blue B.OK3.------Where is his book?------It is___ his bag.A.in B. on4. ------Helen, let’s go to school. ------_____.A.OK B. yes5. ------Wh...