The weather forecast says there' s going to be a heavy storm here in two or three hours, so we have to hurry back home ________ it comes.
【译文】天气预报说这里两三个小时内就会有大雨，所以我们必须在下雨之前赶回家。 本题考查介词辨析。A项“在…之前”;B项“除非”;C项“虽然”;D项“直到”。代入提干，A项符合题意。故选A。