—Isn’t that Ann’s husband over there?---No, it _______be him. I’m sure he doesn’t wear glasses.
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.