Doctor Wang, who ____ western medicine for six years in New York, is now working in a famous hospital in Shanghai.
—Hold the ladder for me! —That’s______
I think I was at school,______I was staying with a friend during the vacation when I heard the news.
There were two boys in the lab,______did the experiment successfully.
After the new technique was introduced the factory produced cars in 1994 as the year before.
I am in______charge of the class which was in charge of my wife.