氢气在空气中燃烧是（），（）。
参考答案：淡蓝色火焰；不易被发现
李阿姨把4000元存入银行，为期5年，年利率是2.88%，存款的利息按5%的税率纳税．到期时，李阿姨可得税后利息和本金一共多少元？
The manager asked the man ______. The man said yes.
A．what the story was about
B．when the story happened
C．if the story was true
D．who told him the story
