句型转换

1. Tom is quiet. Jim is quieter. (用than连成一句)

2. She is cleverer than any other girl in her class. (用最高级改写)

3. Town Cinema is the best movie theater. (划线部分提问)

4. My new trousers are about 180 yuan. (对划线部分提问)

5. I think Sally is the youngest student. (改为否定句)

临床B超通过测量胎头___________径来估计胎儿大小。