He couldn't go to school because it rained heavily.（改为同义句)
问题描述：
He couldn't go to school because it rained heavily.（改为同义句)
答
It rained heavily，So he couldn't go to school
He couldn't go to school because of the heavy rain
答
He couldn't go to school due to the heavy rain.
He couldn't go to school because of the heavy rain.
答
He couldn't go to school because of the heavy rain.