主要是本单元的重点和练习题
根据要求改写句子。
1. There are enough pencils. (变否定句) There aren't enough pencils. ________________________ 2. There are ten pencils.(变为单数句) There is one pencil. _________________ 3. Are there too many T-shirts on the line? . (做否定回答) No, there aren't. _______________ 4. There is enough tme.(变为一般疑问句) Is there enough time? ________________________