2010年版《中国药典》规定肉桂所测定的物理常数（）.
A．相对密度
B．折光率
C．熔点
D．沸点
E．旋光度
参考答案：B
. He wasted a lot of time playing football, otherwise he ________the exam.
A．had passed
B．passed
C．would pass
D．would have passed
