你不知道这条围巾是谁的,你应该问:A. Whose scarf is that? B. Whose scarf is this? C. Whose scarf is it?
Tom _______ things. Now he is making a toy plane.
Li Ming _______ on the _______ floor.
The pupils of our school ______ to visit Liantang Farm tomorrow.
Look! The children are ______ a game under the tree.
______ your mother usually cook in the kitchen?