When the boy walks _______ the table, he often knocks the things _______ it.
When I walked past his house, I heard him _______.
Nancy doesn’t know ______ next week.
— Do you know ____ Mr Green will come tomorrow?— I’m not sure.
Keep ______ English if you want to work on Radio Beijing.A to study B study C studying D studies
Never give your ______information to others on the Internet.