There will be ________water and ________trees in 100 years, how can we live?
These boys are our friends. ______ often help _______.
—Do you like pears? —________. I like bananas.
Let's ______ and ______ the basketball match.
—What do you like _______ lunch? —I like beef and vegetables.
This book is very ________. I don't like reading it.