It was a pity that the great writer died _________his works unfinished.
It is wise of you to well trained workers for untrained ones in your workshop.
Many students listened to the lecture, but I wondered how much they .
The customs office is your luggage is inspected when you enter or leave a country.
We are proud of our hometown, which is in coal and natural crystal(水晶石).
However much you have done, you ought to the help you’ve received from others.