一、选用方框中单词的适当形式完成句子。
biology collect hole universe whole
1. My grandfather is good at fishing and he has a large of fishing rods.
2. The heavy rain caused several deep in the country road, which made driving dangerous.
3. The class was excited about the school trip to the museum.
4. Many have spent years studying wild animals.
5. The book tells us many amazing facts about the , such as black holes.

1. collection 2. holes 3. whole 4. biologists 5. universe

二、用括号内所给单词的适当形式填空。
1. The became famous because his useful changed people's daily lives. (invent)
2. The young used ways to solve the problem. (science)
3. China is a country, and the Chinese people enjoy many benefits. (society)
4. The brave risked his life the dangerous deep cave. (explore)
5. The bird across the ocean last winter, and this long showed its amazing strength. (fly)

1. inventor; invention(s) 2. scientist; scientific 3. socialist; social
4. explorer; to explore 5. flew; flight