单孢病毒性角膜应用糖皮质激素的作用是()
A．预防穿孔
B．减少复发
C．预防并发症
D．抑制病毒
E．控制病情
参考答案：A, B, C, D
—What do you think made Tina so delighted？
—__________ the driving test at her first attempt.
A．As she passed
B．Passed
C．Because of passing
D．Passing
All else equal, which of the following would most likely cause a firm's price-earnings ratio to decline（）
A. The level of inflation is expected to decline.
B. The dividend payout ratio increases.
C. The yield on Treasury bills increases.
