On no account （） held responsible for the car accident, so he should not be put into prison.

单项选择题Diana felt very much upset at （） to the party as she had longed to go for a long time.

A．having not been invited
B．not having been invited
C．not to be invite
D．to be not invited

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