The building is of (historical) importance.
A. 凌乱的
B. 远古的
C. 历史的
D. 原始的
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(Renewable) sources of energy must be used.
A. 可丢弃的
B. 可再生的
C. 可循环的
D. 可观察的
You have to (persevere) with difficult students.
A. 偏激
B. 故意
C. 坚持
D. 无私
A family break allows you to spend (precious) time together.
A. 极限的
B. 宝贵的
C. 有趣的
D. 隐私的
The desire to advance of a youth is an ( ) of great value.
A. locate
B. donate
C. register
D. asset