It was ______ to go down the hills.
With two children ______ middle school in the nearby town now, the parents are working hard.
Having answered the phone, I couldn’t but ______ what would happen next.
All of us remember the earthquake that ______ Wenchuan in 2008.
Paul had to write a history paper, _____ he couldn’t find time to do it.
They want to know ______do to help us.