问题
选择题
Do you know____?
A．if it will be fine tomorrow
B．where did they see her
C．when shall we have a picnic
D．which would you like
答案
答案：A
考查宾语从句。特殊疑问句作宾语，应用陈述句语序，从四个选项中看出只有if it will be fine tomorrow是陈述句语序，所以选A。
试判断下列还原剂的还原性由强到弱的是（）。