问题补充：
--Hello, Sandy. This is Jack. What are you doing?
---I’m watching a match. It started at 7:00 p.m. and on for another an hour.
A. has been
B. was
C. had been
D. will be
答案：
A. has been
B. was
C. had been
(答案→)D. will be
解析：句意：你好，仙蒂，我是杰克，你在做什么？我正在看比赛。下午7点开始的，还需要一个小时。句中有for another an hour.表示一段时间，句中谓语动词要有延续性，be on表示上演，可以延续，故选D
