This song reminds me ______an experience I once had in the countryside.
I have ______ orange, but ______ orange isn’t orange. It’s green.
表示“重要人物”的字母组合是______.
占上中下三格小写字母是______.
下列选项中属于元音字母的组合是______.
I ______believe everything ______ be free in 20 years.