A．did he B．hadn't he C．had he D．didn't he
单项选择题The doctor insisted that the patient（）before Christmas.
A．will have an operation B．would have an operate C．had an operation D．have an operation
单项选择题Was it in 1969（）the American astronauts succeeded in landing on the moon
A．that B．ever since C．when D．of which
