Kangaroos have very strong legs ,so they are very g( ) at jumping.

Kangaroos have very strong legs ,so they are very g( ) at jumping.
续上表
Their tails are very strong ,too.So when they w( ) to have a rest ,they rest on their t( ).Kangaroos are a( ) very good at looking after their babies.Mother kangaroos k( ) their babies safe in their pockets.