用适当的介词填空。 1.Some animals sleep _______ winter. 2.I often play ________ my pet cat. 3.Look _________ my new watch. 4.Thank you ________ your present, Mum. 5.Look! The boy is coming out _________ the box. 6.There's an owl _______ the tree. 7.He's a good student. We should learn _______ him. 8.I read books ________ one hour every night.