23. “If anything ________ to the patient, let me know at once, please.” the doctor said to the nurse.
After the Six-Party Talk in Beijing, an agreement was reached __________ that North Korea would abandon __________ nuclear weapons.
There is a new problem involved in the popularity of private cars __________ road conditions need __________.
We've been told the good news, but when and where to go for theexciting paid vacation __________ yet.
In 1948,three American scientists invented __________ transistor, which is __________ small electronic device to control an electric current.
__________ yesterday, we went out for a walk.