There are  ______  people in the room, so it’s very crowded (拥挤的) .

Now the air in our hometown is ___________ than it was before. Something must be done.

The population of China is ______ than ______ of Japan .

Eagle Father was so__________ with his son that he kept the four-year-old son running in the snow without clothes.

Of the two T-shirts，I’d choose the ___one to save some money for a book.