I have worked for the whole term and it's a great ______ for me to be chosen as the Excellent Student Award.
A：surprise
B：sadness
C：joy
D：pity
This is Lisa. She's my classmate. She's short.
一架飞机顺着本初子午线从南极到北极，纬度变化的规律是（ ）
长汀冬季的某天的最高气温是8℃，最低气温是﹣1℃，则这一天的温差是（ ）
