A completely new situation is likely to _____ when the school leaving age is raised to 16.
--- I saw your uncle take a taxi to the airport. Why didn’t you drive him there? --- I ______. But my car ______.
I will be surprised if you can get Calvin, who is very mean, ______ these donation draw tickets from you.
As is known to all language learners, newly learnt words will soon be forgotten unless ______ used in everyday communication.
Many students listened to the lecture, but I wondered how much they ______.
I think that something has to be done to stop the air from being polluted, ______ ?