下列选项中属于元音字母的组合是______.
Why not ______ upstairs and have a rest?.
A lovely Micky Mouse can _____ when you walk into the park.
He worked hard __________ go to the best university.
We need to buy some fruit.There are _____ apples in the fridge.
The family sent clothes to the homeless and made them ______ warm in winter.