时态综合复习与运用 — 英语选择题
题目
选出能正确填入空格的一项。While we ___ for the bus at 5 yesterday, it ___ to rain. We ___ a bus since then. A. waited; was beginning; didn't take B. were waiting; began; haven't taken C. are waiting; began; didn't take D. have waited; begins; haven't taken