The reason ________they were fired was ____they were not honest.
—Who is the girl over there?—Isn't that the secretary you want ________ the article?
As the immune system weakens, it loses the ability ________ illnesses.
My mother went to the private school in person ________ that I would be safe there.
China is expected to export 1 billion mobile phones this year, ________ by a surge in demand for smartphones worldwide.
Misunderstandings ________ from lack of social communication, unless ________ properly, may lead to serious problems.