—Mr. Smith _____ in Russia for 10 years. —No wonder he can speak Russian fluently and now teaches Russian in a Chinese college.
------- Where did you find him? -------It was in the hotel _____ he lived.
The scientist ______ much of his time to increasing the rice production.
The goods are of good _________.
There are two buildings, _______ stands nearly a hundred feet high.
What’s your attitude ______ going abroad?.