“I’m taking a long vocation. I’m going to the Great Wall.” “ _______ .When are you leaving”

My mom once worked in a very small village school, which is _____ only on foot. [ ]

He is never _________ class.

It’s _______ to work out the mathproblem. You needn’t go to ask the teacher.

I clapped my hands happily _______ the pilot’s beautiful flight on the Air Show