-What is the __________ of the polar bear?-It __________500 kg.
Millie swims faster than Cindy ________.
--- Your coffee smells good! --- It’s from Brazil. Would you like ____?
The 16-year-old _____ often shares her _____ and sadness with her best friend.
--What’s in the bag? --_____________.
向别人介绍自己的兄弟时应说:.