肺癌可以通过支气管扩散，最常见于：
A．鳞癌
B．未分化小细胞癌
C．大细胞癌
D．支气管肺泡癌
E．类癌
参考答案：D
Are the parents who let their child who is ______ walk in the dark alone at night considerate?
A．young enough
B．too young to
C．not old enough to
D．so young
虽然汤姆和尼克关系不怎么密切，尼克总觉得他很看重自己，希望自己也喜欢他（）
