矿井火灾的三要素是指（）。
A、可燃物、引火源、充足的氧气
B、引火源、爆炸物、氮气
C、汽油、火源和空气
参考答案：A
—Is there ______ in today’s newspaper?
—No, there’s ______. [ ]
A. anything special; something unusual
B. anything special; nothing unusual
C. special anything; nothing unusual
D. special anything; unusual nothing
罗切斯特先生结婚后，与妻子同住了（）年。
A.3
B.4
C.5
D.7
