--- Do you know Cindy was famous at_______ very young age.--- Yes. But she died young. She died at_______ age of 33.
I think picking apples ________ very interesting.
What’s your brother like? ________.
Helen told me that she had some problems _______ his English learning.
I think maths is not ________ science.
---Which pen can I take? ---You can take ______ pen you like.