当然可以，以下是一段适合五年级英语贺卡的祝福语：

Dear [朋友的名字],

Wishing you a very happy birthday! May this special day bring you joy, fun, and all the good things in life. As you grow older, may you always stay curious, brave, and kind. Remember, your dreams are as big as the sky, and with hard work, you can reach them all. Have a wonderful year!

Best wishes,

[你的名字]

这段祝福语既表达了对朋友的生日祝福，也鼓励他们在成长的过程中保持好奇心、勇敢和善良，并努力实现自己的梦想。希望这可以帮助你！