根据提示选择正确答案。 1.当需要别人的帮助时应该说 [     ] A. I need your help. B. I want your help. C. Can you help me, please? D. Thank you for your help. 2.当你拒绝对帮助时，你应该说 [     ] A. I can do it myself. B. Don't help me. C. No, thanks. D. Thank you. 3.当递给别人某物时，你应该说 [     ] A. Here it is. B. Here he is. C. Here you are. D. Here they are. 4.当别人对你致谢时，你应该说 [     ] A. Don't thank me. B. You're welcome. C. No, thanks. D. That's right. 5.当询问别人得到回答后，你应该说 [     ] A. No, thanks. B.I know it now. C. Are you sure? D. Thank you.