A.蛋白質(zhì) B.粗纖維素 C.茶多酚 D.氨基酸
A.I’m sorry. B.I’m sorry to have kep tyou waiting. C.I’m sorry to be kept waiting. D.Sorry to wait so long.
A.Can I have any assistance? B.Can I help you? C.Can I beany assistance? D.Can I be of some assistance?