Many buildings in the city need repairing, but the one     first is the library.

_____ by the heavy snowfalls, Chenzhou, a city in South China, was cut off from the outside, ________ water and electricity shortage. 

When he came to life, he found himself ______ to a tree.

(2013·泰安一模)________ in the countryside made Mr. Wilson very hardworking when he was very young.

       “thanks” is polite when someone has done you a favour, but saying it too often is quite another thing.