—Are you getting on well with Tom?—Not very well, but we used to be friends. The more I know him, ________ I like him.

-Is Lucy or Lily the _   _ of the twins? --Lucy. She was born half an hour earlier.

 Now people would like to use _______ plastic bags to help protect the environment.

The population of Tianjin is ______ than that of Shanghai.

Many experts think pigs are ______ to train than dogs or cats.