按要求改写下列各句，每空一词。

1. The bus ride usually takes about 25 minutes. (改为一般疑问句)

    ______ the bus ride usually ______ about 25 minutes?

2. Jack has to go to see the doctor. ( 对画线部分提问)

   ______ does Jack ______ to ______?

3. They can make bread. (改为一般疑问句)

   ______ they ______ bread?

4. Li Lei is ten years old. Lin Tao is twelve years old. (合并为一句)

    Li Lei is ______ ______ Lin Tao.

5. Our bikes are not the same as theirs. (改为同义句)

    Our bikes are ______ ______ theirs.

二氧化碳灭火器使用时应注意风向，逆风喷射会影响灭火效果。