China’s lunar space program has no purpose __________ scientific achievement, and it is not competing with any other country, a senior official said yesterday.
He was good at arts, but ______, he was studying hard ______ being admitted to an engineering college.
I tried to call you last night, but I couldn’t ______.
Which ______ did you enter for at the sports meet?
In the end the police decided not to ban the ______.
The tyre of your car is flat. It needs ______.