牌号QT表示（）
A、球墨铸铁
B、灰铸铁
C、可锻铸铁
D、蠕墨铸铁
参考答案：A
It was the dream that he would make ______ good fortune on the international stages that made Lang Lang decide to go to the USA for ______ further study.
A．a, a
B．/, the
C．a, /
D．the, the
