The teacher was angry that all of them arrived late for a(an) ___ of reasons.
Xiao Li said that he ____ in that small village then and didn't want to leave there.
___ is believed ___ more and more people would fly to the moon in the future.
This ____ of trousers ____ fit me. Please show me ____.
She likes to use words ___ is clear to us.
He got home from work only to find the door ___ and something ____.