Some people who don’t like to talk much are not necessarily shy; they _______ just be quiet people.
I listened to Dr.Wilson’s lecture about the protection of wild animals,but I was unable to grasp its key _________.
—Why did she spend so much time searching shop after shop only for a blouse? —Oh,she was very __________ about her clothes.
After swimming in the sea,they came out of water and lay on the ___________ for a rest.
Life is tough in the city.In order to lose their _________,some people drink alcohol.
What a poor boy!He was born with __________ his backbone.