句型转换。
1. Mother bought him a new bike as the birthday present. (一般疑问句 )
Mother him a new bike as the birthday present?
2. Mr. Yang gave me the new scarf.(改为同义句)
Mr. Yang gave the new scarf ．
3. I asked them to visit the museum that day. They didn't say no.(合并成一句)
They me to visit the museum that day.
4. My sister looked after me while l was in Wuhan.(改为同义句)
My sister me while l was in Wuhan.
5. She took an interest in dancing.(改为同义句)
She dancing.
某烷烃可与
完全取代，则此烷烃的分子式为（ ）