题干

—What about your TEFL test?
—I have answered all the questions, but I’m not sure _____ I could get a high enough score. 
A.whatB.ifC.whenD.why
上一题 下一题 0.64难度 单项选择 更新时间:2011-03-22 01:50:19

答案(点此获取答案解析)