都可以的. he is a tall and handsom boy. I have a dog and a cat in my house.she walked back and forth in front of his house. 另外是 I like green and red apples.有问题请追加~谢谢！ 还有and前后如果是不定式，比如：A is the most used method to manage acute bleeding and to prevent recurrent bleeding.正确，还是应改为 and prevent recurrent bleeding 正确？书面语法是要带上介词 to 的，不过不写的话也不算大错。谢谢，非常有帮助！