1．(2017·全国卷Ⅰ)____ ______ (unfortunate), you must carry the necessary equipment with you, since it's all but impossible to find natural substitutes.
[答案] Unfortunately
2． It is always __________ (crowd) with customers at meal times.
[答案] crowded
3．Nor does anyone know if this gene would behave ________ (similar) in people.
[答案] similarly
4．__________ (tour) is the major source of income for this area.
[答案] Tourism
5．Yet, most parents use an __________ (education) program as a chance to park their kids in front of the set and do something in another room.
[答案] educational
6．The bear behaved abnormally, probably because of __________ (hungry)．
[答案] hunger
7．This association, founded by Bill Drayton, has fought __________ (poor) and sickness, promoted education and encouraged small businesses.
[答案] poverty
8．Their inventions have contributed to the __________ (develop) of electrical engineering.
[答案] development
