下列各项不是节肢动物共同特点的是 [ ]
A．体表有外骨骼
B．身体由许多体节组成
C．足和触角分节
D．有翅能飞行
答案：D
It was not until midnight _____ they reached the camp. [ ]
A. that
B. when
C. while
D. as
软故障
