A:the temperature falls below zero here
B:falls the temperature below zero here
C:does the temperature fall below zero here
D:has the temperature fallen below zero here
七年级同学小诚(男)和同学小菲(女)家住一幢楼。他俩有时一起上学和回家,还常常在一切讨论学习。不久小菲发现,一些同学看她的眼神发生了变化,还窃窃私语,什么“青梅竹马”等流言蜚语也在班里传开了。你对他们交往的态度是( )
As a kind of important energy, coal(煤炭) can _______ one day.