单词拼写
R      are used to store water in case of floods or droughts.
Our school has a large hotel which a       1,000 guests.
Burning coal has led to g         warming.
Water will change into ice when the temperature drops to the f     point.
He is seriously ill. So he can’t take the t       examinations.
The DCIO         (坠毁) shortly after takeoff.
A bridge is a         (建筑物) built over a river or road that allows people or vehicles to cross from one side to the other.
It is difficult to travel through the city on a         (有雾的) day.
He is studying         (土木工程) at university.
The submarine         (浸入水中) to avoid enemy ships.