High school is _______ time of discovery and learning, and it is also _______ very enjoyable and valuable experience for every one of us.
With so much work his head all day long,he feels rather stressed in his daily life.
Zhuhou, _______ on the Xiang River, is an important city, second only to Changsha.
The flowers his friend gave him will die unless______ every day.
The boy wanted to ride his bicycle in the street, but his mother told him _____.
It’s cold in here. We must have the fire day and night.