_______ in the 1800s and first mass-produced in Germany, the harmonica(口琴) was designed to play simple folk tunes.
He cut the cake.
You’ll have to spend writing your report here.
He has lived at for 30 years.
---You don’t often see them, do you? ---No, I see of them.
He is clever and hard-working, so he has reason to succeed in the exam.