完形填空（共20小题：每小题1分， 满分20分）
阅读下面短文，掌握其大意， 然后从21-40各题所给的四个选项（A、B、C和D）中，
选出最佳选项，并在答题卡上将该选项标号涂黑。
Flood damage cleanup is an unforgettable experience for me. I have seen a number of news reports on television showing houses that have been 21 by natural flooding and how the different 22 there are coping and starting their flood damage cleanup. I have always felt 23 for the families that have become victims of flooding however I couldn’t imagine what they were 24 because I have never experienced flooding or flood damage cleanup at first 25 until two years back.
