Because of the snow , many parts of the countryside are only _____ by helicopter.

It was most          of you to lend me money when I was in trouble.

This kind of plant is ______  to the changes of the temperature. So you should keep it from freezing.  

Although my grandfather is in his eighties, he is still as ________ as a young man and hates sitting around doing nothing all day.

—What do you think of her performance?    —Wonderful．____heard a ____voice．