1. His favourite subject is art. (对画线部分提问)
his favourite subject?
2. Peter likes art because it's relaxing. (对画线部分提问)
Peter like art?
3. Tony has P. E. on Friday. (对画线部分提问)
Tony have P. E.?
4. I like English best. (改为同义句)
English is .
5. Math is very difficult, so Gina doesn't like it. (改为同义句)
Gina like math it's very difficult.

1. What is
2. Why does
3. When does
4. my favourite subject
5. doesn't; because

★★★完成语段: 用 and, but 或 because 补全短文
Bobby is a boy from the USA. His favourite subject is Chinese. Why does he like the subject? 1. he likes China very much. He wants to know something about the history of China, 2. it's difficult for him now.
Bobby does well at school. He has seven lessons every day, four in the morning 3. three in the afternoon. He likes maths and science, 4. his P. E. isn't very good. He doesn't like doing sports. He is busy from Monday to Friday. 5. on Saturday and Sunday, he is free.

1. Because
2. but
3. and
4. but
5. But

1. 根据“Why does he like the subject?...he likes China very much.”可知后句是前句的原因，因此选择because。
2. 根据“He wants to know something about the history of China,...it's difficult for him now.”可知知道前后内容为转折关系，因此选择but。
3. 根据“four in the morning...three in the afternoon.”可知知道前后内容为并列或递进关系，因此选择and。
4. 根据“He likes maths and science,...his P.E. isn't very good.”可知前后内容为转折关系，因此选择but。
5. 根据“He is busy from Monday to Friday...on Saturday and Sunday, he is free.”可知前后内容为转折或对比关系，且空格后部分为一个独立的句子，因此选择But（句首单词首字母大写），但在选择填空并填写答案时无需考虑首字母大小写问题，直接填but对应的选项即可。