1. His ruler is in the box. (對畫線部分提問) ___ ____ his ruler? 2. This room is Lucy and Lily's. (改為選擇疑問句) _ _ this room Lucy's ____ Lily's? 3. Is he your friend? (改為復(fù)數(shù)) ___ ____ your ____? 4. These are our apples. (改為單數(shù)) ___ is ____ ____. 5. The boy is all right today. (對畫線部分提問) ___ ____ the boy today? 6. They can see a bird in the tree. (對畫線部分提問) ___ ____ ____ see in the tree?