-----when has the country been open to international trade?-----1978, I suppose.
—He admitted________in the exam. —That’s why he was not admitted________universities or colleges.
—Have you graduated from Shandong University? —Yes.I________there for 4 years.
The train moved slowly from the station,but________speed as it reached the open country.
We must keep our room clean,for dirt and disease go________,you know.
Hosting the 31st Olympics is________great honor and the Brazilians are working hard to make the games________success.