单项选择题
A．having not been invited B．not having been invited C．not to be invite D．to be not invited
Last week I wrote to the hotel to book a room, but they...
单项选择题Last week I wrote to the hotel to book a room, but they （） yet.
A．didn't answer B．wasn't answering C．hadn't answered D．haven't answered
Having been told that her son died in the accident, the...
单项选择题Having been told that her son died in the accident, the old woman appeared very calm, as if nothing（）
A．happened B．were happened C．was happened D．had happened
（） ten minutes earlier, you wouldn't have missed the tr...
单项选择题（） ten minutes earlier, you wouldn't have missed the train．But you were late.
A．Had you come B．Did you come C．Have you come D．Should you come
