Some aspects of a pilot’s job__________ be boring, and pilots often ________ work at inconvenient hours．

The boys were playing football on the ground. Sandy didn’t want to ______ them.

The letter is from my sister, ______is working in Beijing.

There is no doubt that he is a ________ musician, as he could compose some music from his childhood and now he is very famous all over the world.[ ]

It’s required that the students___ mobile phones in their school, so seldom ____ them using one.