题目内容
17．Everyone should make a contribution to protectingthe environment．分析 每个人都应该为保护环境做出贡献．
解答 答案：protecting．
根据所给首字母提示结合语境推测句意是"每个人都应该为包含环境做出贡献．"，根据设空处前面的短语make a contribution to"为…做出贡献"判断设空处缺少动词的ing形式，所填单词"保护"是protect，所以答案是：protecting
点评 做这类题型，首先根据所给单词首字母明确句子所要考查的单词的拼写，再结合相关语法知识对单词做出形式上的变化．
练习册系列答案
相关题目
7．-Jenny，do you know WeChat（微信）was created by？
-By Zhang Xiaolong，right？（ ）
-By Zhang Xiaolong，right？（ ）
| A． | What | B． | Who | C． | Whose | D． | Which |
8．-He was not sure ______ for his mother's birthday．
-Why didn't he ask his dad for some advice？（ ）
-Why didn't he ask his dad for some advice？（ ）
| A． | what he was going to buy | B． | what was he going to buy | ||
| C． | to buy what |
2．-May I borrow this dictionary？-Sorry．This is not _____．It's Lily's．（ ）
| A． | my | B． | mine | C． | her | D． | yours |
6．-Could you tell me ________？
-It's twenty minutes by underground．（ ）
-It's twenty minutes by underground．（ ）
| A． | how can I get to your school | |
| B． | how much it costs to get to your school | |
| C． | how far it is from your home to your school | |
| D． | how long does it take me to get to your school |
7．I didn't see Miss Zhang in the teacher's office just now．Do you know ______？（ ）
| A． | why didn't she come | B． | how would she come | ||
| C． | when would she arrive | D． | where she hasgone |