Sam and Bill are brothers. But Sam is _than Bill.

I know this plan is far from perfect, but I just can’t think of ____ one.

—Why do you like living in the countryside? —Because there’s _______ noise and _______ cars there. 

Of all Gong Linna’s songs, I like her Uneasy（忐忑）________.

If there are     trees, the air in our city will be      cleaner.