He's busy________ English.A.learn B.learning C.to learn
( ) It is very ______ of you to make such stupid mistakes.
( )-- Mom, we are running out of milk. -- Let's go to the ______ to buy some.
( ) In order to give children a better life in the future, we should ____ the environment.
( )Excuse me, may I ______ your dictionary? ______ is at home.
( ) There are _____ oranges on the table.