一、用 that/if/whether 填空
1. The TV news reported heavy snow would come this weekend.
2. I want to know the store is open on Sundays.
3. They are worried about they can arrive on time.
4. I realize there are so many differences between different cultures.
5. My mother doubts we can finish the housework before dinner.

1. that 2. if/whether 3. whether 4. that 5. if/whether

【分析】要解决这道题，需先明确that、if、whether在宾语从句中的用法规则：① that用于引导陈述事实的宾语从句，无实际含义；② if和whether用于引导表“是否”的疑问性宾语从句；③ 特殊规则：介词后面接宾语从句表“是否”时，只能用whether，不能用if。接下来结合每个句子的语境判断引导词即可。
【解析】1. 本句中宾语从句“heavy snow would come this weekend”是陈述事实的内容，因此用that引导，填that；2. 本句中“want to know”后接疑问内容，表“是否”，if和whether都可引导此类宾语从句，填if/whether；3. 空格前有介词about，根据规则，介词后接表“是否”的宾语从句只能用whether，填whether；4. 本句中宾语从句“there are so many differences between different cultures”是陈述事实的内容，用that引导，填that；5. 本句中“doubts”后接疑问内容，表“是否”，if和whether都可引导，填if/whether。
【答案】1. that 2. if/whether 3. whether 4. that 5. if/whether
【知识点】宾语从句；that/if/whether用法
【点评】本题考查宾语从句引导词的基础用法，是初中英语核心基础知识点，主要考察学生对that（引导陈述事实的宾语从句）、if/whether（引导疑问“是否”的宾语从句）的区分，以及介词后用whether的特殊规则，题目难度适中，适合基础阶段巩固练习。
【难度系数】0.7

二、按要求完成句子
1. Mary says, "I will go to visit the Great Wall."（改为间接引语）
Mary says will go to visit the Great Wall.
2. Betty asks me, "Can I go there with you?"（改为间接引语）
Betty asks me can go there with me.
3. I think he can keep himself away from danger.（改为否定句）
I think he keep himself away from danger.
4. 老师向全班解释过光比声音传播得快。（汉译英）
The teacher explained to the class light faster than sound.
5. 她告诉我她整个下午都在学习法语语法。（汉译英）
She told me French grammar all afternoon.

1. that she 2. whether/if she 3. don't; can 4. that; travels 5. that she was studying

【分析】1. 直接引语变间接引语时，陈述句需用that引导宾语从句，人称要随主句主语变化，原直接引语主语I对应主句主语Mary，需变为she；2. 直接引语为一般疑问句，变间接引语用whether/if引导，人称随Betty变为she；3. 主句为I think时，否定需转移到主句，即否定主句的think，从句保持不变；4. 宾语从句中陈述客观真理时，时态用一般现在时，光传播是客观事实，主语light为第三人称单数，动词用travels，引导词用that；5. 主句为过去式told，直接引语的现在进行时需转换为过去进行时，引导词用that，主语为she。
【解析】1. 直接引语是陈述句，转换为间接引语用that引导宾语从句，第一人称I与主句主语Mary一致，变为she，故填that she；2. 直接引语是一般疑问句，转换为间接引语用whether或if引导，原主语I与Betty一致，变为she，故填whether/if she；3. 当主句主语是第一人称且谓语为think时，否定需转移至主句，因此用don't否定think，从句情态动词can不变，故填don't; can；4. 此处为宾语从句，陈述“光比声音传播得快”这一客观真理，时态用一般现在时，主语light是第三人称单数，动词用travels，引导词用that，故填that; travels；5. 主句为过去式told，直接引语的现在进行时需转换为过去进行时，引导词用that，主语为she，故填that she was studying。
【答案】1. that she 2. whether/if she 3. don't; can 4. that; travels 5. that she was studying
【知识点】直接引语与间接引语、宾语从句、否定转移
【点评】本题考查初中英语核心语法知识，涵盖直接引语变间接引语的规则、否定转移、宾语从句时态等基础考点，需掌握相关变换要求。
【难度系数】0.6