从以上单词中选出最适当的一个单词,填入空格内.
1 He tried to ( ) the fact that he broke the window glass.
2 Churchill's ( ) proves that he was a great man.
3 To bring fire into ( ) with gasoline may cause an explosion.
4 The cat ( ) quietly nearer to the bird, but the bird flew away.
5 I am sorry to ( ) your invitation to dinner because I have to study for the examination.
答案：
1 He tried to (conceal) the fact that he broke the window glass.
2 Churchill's (career) proves that he was a great man.
3 To bring fire into (contact) with gasoline may cause an explosion.
4 The cat (crept) quietly nearer to the bird, but the bird flew away.
5 I am sorry to (decline) your invitation to dinner because I have to study for the examination.
