作此决定并非偶然,对此我已思虑多时。
The decision and I'd thought about it for long.
I (forget) to turn off the light when I left my room yesterday.
My cousin has a pet dog. (it) name is Wangwang.
He is too weak. It's (possible) for him to move the heavy box.
Xiao Liu put his umbrella in the (角落)of the room.
Mid﹣autumn Day is a (传统的)festival in China.