Hong Kong returned to the motherland ________ July 1st, 1997.A. on B. in C. at
We can get more ______ about the international affairs on the Internet than before.
Ted told us ______ funny story, but he forgot ______ ending himself.
— Look at the sign on the right. — Oh, parking here.
There _______a river in front of my house.
Jane looks unhappy all day today. _____ seems that she knows the bad news.