Even a mighty express train can be held up by signals. Which of the following words can be used to replace “held up”? [ ]

We haven’t decided to go. —Of course to Beijing.

There_ going to be a basketball match this afternoon.

You can only be sure of_________ you have at present; you cannot be sure of something _____ you might get in the future.

______ does Mike live —He lives in the city of Beijing.