If he _________ more time practicing spe
题型：选择题
问题：
If he _________ more time practicing speaking English before, he ____ able to speak it much better now.
A．spent; will be
B．had spent; would have been
C．spent; would have been
D．had spent; would be
冠折，断面与牙龈平齐，根管口暂封，无叩痛，无松动，牙龋无充血、水肿，前牙咬合较紧，其余牙无明显异常。X线片显示已作完善的根管治疗，根尖无明显阴影。