换种方式表达下列各句。 1. John is taller than my sister. My sister is ____________ ____________ ____________. 2. This desk is black. This is ____________ ____________ ____________. 3. Tony has no time on Wednesday. Tony ____________ ____________ on Wednesday. 4. It is colder in winter than in spring. It is ____________ in ____________ than in ____________. 5. Sarah is ten years old. Amy is eight years old. Amy is two years ____________ ____________ Sarah.