John has no alternative but ______ his parents for help.

(单选题)21. （ ） (单选题)To achieve better shopping experiences, customers are advise (单选题)What contributes most to smoothing over issues with customer (单选题)Shop owners often hire moonlighting police as parking attend (单选题)Why are store managers often the last to hear complaints? (单选题)The underlined word “advent” in Paragraph 3 can be replaced (单选题)Contrary to traditional ways of interaction, social media __ (单选题)The statistics in the second paragraph show that ______. (单选题)What may be the best title for the test? (单选题)What is the final purpose of the education program?