单项选择题
A、 needn't dress up B、 needn't have dressed up C、 didn't need to dress up D、 didn't need to have dressed up
A、 the handle of it B、 with its handle C、 whose handle D、 the handle of which
A、 is believed to have started B、 they believe to have started C、 that is believed to start D、 that they believe to start