碳、铁丝、蜡烛在氧气中燃烧的共同现象是 [ ]
A．都有气体生成
B．都能发热
C．都有淡蓝色火焰
D．都有水生成
答案：B
In such dry weather, the flowers will have to be watered if they _____. [ ]
A. have survived
B. are to survive
C. would survive
D. will survive
欧洲古代文学是指奴隶制社会的（）文学。
