Please fill in the blanks with the proper forms of words given below. deserve appreciative grateful devote assure I can ________ you that you will pass the English exam as long as you work hard. I'm so ________ of your kindness. Jack Ma has ________ all his life to China's E-commerce. I'm so ________ for all your help. He's the most hard-working students in our class, so he ________ the scholarship.