Fill in the blanks according to the first letter given to complete the sentences (根据首字母填入适当的单词)
1.John is more i________than Tom.
2.I have a s________everyday in summer.
3.I go to school on foot i________of by bike.
4.It is very i________for us to learn English well.
5.Water c________almost three quarters of the Earth.
6.Tigers are one of the most d________animals.
7.We can save water by f________a dripping t________.
8.Farmers need to water the c________and v________on their farms.
____________ 2. 
____________
____________ 4. 
____________
____________ 6. 
____________