1．The necklace bought yesterday is __________ (值……钱)$5,000.
[答案] worth
2．With exam approaching, we shouldn't __________ (浪费) time.
[答案] waste
3．The Great Wall is one of the greatest __________ (奇迹) in the world.
[答案] wonders
4．The girl dressed in red soon became the __________ (焦点) of the party.
[答案] focus
5．The government __________ (监测) the quality of air last year.
[答案] monitored
6．The __________ (danger) languages can be saved and reconnected with speech communities.
[答案] endangered
7．(2016·全国卷Ⅱ)I know you take good pictures and you've always wanted to do something for environmental __________ (protect)．
[答案] protection
