My father used to ______ me to concerts.But now, I have no time for concerts.

What does David often do at weekends 一He often mountains with his friends.

There isn’t _______milk in the glass.

As we all know, with the development of science and technology, the earth’s resources are ________ at an alarming rate, so we should make good use of them.

There _______ a sport meet next week if it ______.