A lot of trees ________ around here every year, and we can enjoy fresher air now.
— What does the fresh juice contain? — ________of the juice ________ orange. It's very pure.
— Why can’t the boy understand what the American teacher said? — Because he is a beginner, _______ he knows ________English.
— Mom, I got _______ place in the English Speech Competition? — _______! That's really good news, dear!
— What are the _______ doing there? — They are busy _______ their science experiment.
— Who will teach _______ oral English next term? Can it be a new teacher? — Perhaps. But our head teacher hasn't told us ________ .