问题补充:
---How long has the meeting ?
--- Just a minute. I will check the time.
A. begun
B. started
C. been on
D. been begun
答案:
A. begun
B. started
(答案→)C. been on
D. been begun
解析:句意:-会议开始多长时间了?-仅仅一分钟。我会核对一下时间。句子中how long是对一段时间来进行提问的,而begin 和start 都是瞬间性动词,不能与一段时间连用,故A、B、D可排除;be on 是一个系表结构的短语,可以持续,故选C。