问题详情：
根据要求，句型转换
of them don’t have an environment with air. (改为全部否定句)
____________ __________ them has an environment with air.
box is too heavy for me to carry. (改为同义句)
The box is not ____________ _____________ for me to carry.
y started to learn Chinese in 2010. (改为现在完成时)
Betty ___________ ___________ Chinese ___________2010.
father bought a pair of glasses two days ago. (改为现在完成时)
His father ___________ __________ a pair of glasses __________ two days.
【回答】
1. None of 2. light enough 3. has learned; since 4. has had; for
知识点：句型转换
题型：未分类
