三、选词填空,必要时改变形式。(appreciate, apologize, refuse, grateful, log in, helpful, serve) 1) I’m afraid I have to ________your demand for free shipping. 2)I ________ for the mistake I made. I’ll send you a new one immediately. 3) The webpage is blank because there is something wrong with the ________. 4) I’m ________ that you send me the excel document. 5) If this email address is incorrect, please try to ________ again with the account and password you’ve just used to sign up. 6) I’d ________ it if you could give me some ideas of the gloves that are popular in your country. 7) Thanks for your suggestion on the product design. It’s very ________.