最早萌出的恒牙是
A．上颌第一磨牙B．上颌第二磨牙C．下颌第二磨牙D．下颌第一磨牙E．上颌中切牙
参考答案：D
— Hi, Lydia. Are you going to the concert on Friday?
— I'd like to . But there are so many problems_____.[ ]
A. remained to be settled
B. remaining to be settled
C. remained settled
D. remaining settled
驾驶机动车在道路变窄的路段可以跟在任何一辆车后汇入车流。
