A:最像黑猫
B:最像花猫
C:最像白猫
D:无法确定
四位学生在做研究性学习时,以中国古代四大发明对西方历史影响为题,各命了一个小标题,你觉得哪项最不适宜( )
He lost his key. It made him ________ in the cold to wait for his wife's return.
下列全为遗传病的是( )