问题
选择题
--- Kitty, do you know ______?
---Sure, about forty minutes.
A．when did their class meeting begin.
B．where their class meeting was held
C．how often their class meeting is held
D．how long their class meeting will last
答案
答案：D
题目分析：句意：凯蒂，你知道他们的班会开了多长时间吗？当然，约四十分钟。在宾语从句中只能使用陈述句语序，不能使用疑问句语序，结合答语中about forty minutes.可知该选D。