extremely interesting
The magician’s performance was so (a)   that everyone watched in silence.

living beings, especially animals（生物；动物）
Many sea (a)   glow in the dark to protect themselves from danger.

a length of time
The dinosaurs lived during a long (a)   called the Mesozoic era.

showing love or care（深情地；亲切地）
The grandmother smiled (a)   at her grandchildren as they played.

the business of people traveling for pleasure（旅游业）
The island depends on (a)   for most of its income.

grows or develops successfully（繁荣；茂盛）
The small town (a)   during the summer when many visitors arrive.

a particular area or part of a country（地区；区域）
This (a)   is known for its mountains and cold weather.

the way someone or something looks（外貌；外观）
Her sudden (a)   at the party surprised everyone.

not moving at all
The deer stood (a)   , hoping the hunter wouldn’t see it.

became weaker, fewer, or lower
The number of penguins in the area has (a)   due to warmer temperatures.

to flow over the edge（溢出；泛滥）
After the heavy rain, the river began to (a)   into nearby fields.

people who are very interested in something（热衷者；爱好者）
Bird (a)   visit the park every year to watch rare species.

more demanding or severe（更严格）
The school has become (a)   about homework to help students stay disciplined.

the process of becoming healthy again（治愈；康复）
Time is often the best medicine for (a)   a broken heart.

the ability to recover quickly from difficulties（恢复力；韧性）
Her (a)   helped her overcome many challenges in life.