2009年12月19日，（）气候大会落下帷幕。
A.巴厘岛
B.哥本哈根
C.苏黎世
D.巴塞尔
参考答案：B
— You were late again, Peter.
—Sorry, I ______ to be here on time, but the traffic on the roads _____ heavy.
A．wanted; was
B．had wanted; was
C．wanted; would have been
D．had wanted; would have been
乙炔减压器上装有安全装置，当输出气体的压力大于（）MPA时完全开启。
A、0.024
B、0.24
C、2.4
