用合适的连接词填空。
He talked about the teachers and schools ________ he had visited.
Some of the roads were flooded, ________ made our journey more difficult.
The novel ________ you’re interested was written by Mark Twain.
_________ is often the case, we have worked out the production plan.
He has told me _________ he will go to Shanghai tomorrow.
I want to know _________ he has told you.
The question is _________ they will be able to help us or not.
Go and get your coat. It’s _________ you left it.
_______ broke the glass yesterday is not clear.
_________ car you will choose to buy makes no difference.
_________ breaks the law should be punished.