1．He tried hard to find a __ （reason）__ enough excuse but failed.
2．It is difficult to put an accurate _____ on the survey results. （interpret）
3．He has got a serious disease just because he lived in __ （health）__ conditions.
4．The ____ that her father has been murdered by her husband really upsets her．（assume）
5．She listened with a _____ expression on her face．（puzzle）
