The room was filled smoke after the big fire and people had to stay outside.

How I wish we studied ________ there are fewer exams!— You’re joking! [ ]

Excuse me. Is there a post office nearhere

We needn’t hurry all the way to the airport — theflight has been because of the bad weather.

下列各句中，划横线成语的使用恰当的一项是（ ）