It was in 1949 _____the People’s Republic of China was founded. [ ]

The boys ______ the newspaper on the ground and began to read the news and articles in it. [ ]

The computer, help we human beings have stepped into the information age, should be regarded as one of the most important inventions in the 20th century.

Do you know ______ over there

She won’t lose weight ___ she keeps a diet and takes exercise every day