为下列问句选择正确答案。 (     ) 1. What's in the room? (     ) 2. Is that Jeff? (     ) 3. Are these your grandparents? (     ) 4. Is my pencil case in the bookcase? (     ) 5. Are the books on the sofa? (     ) 6. Is the computer on the floor? (     ) 7. Who is your friend? (     ) 8. What's this in English? (     ) 9. Is that boy your brother? (     ) 10. Where's my baseball? A.  Your baseball? I don't know. B.  Yes, they are. C.  No, they are in the backpack D.  No.  It's on the desk. E.  No, it's Jack. F.  Yes, it is. G.  No, it's my cousin. H.  There are some things in it. I.   Guo Peng. J.   It's a clock. .