Over the years the European Union has made great efforts to _______ the safety of food and protect the health of its people.
______ she has earned her PhD, she wants to find a job with higher pay.
Prince William took a visit to the Forbidden City on Feb. 28, ______ emperors once lived.
Mike will become the first person in his family ______ college education.
The long lasting cold current has brought ________ winter in my memory to the east coast of the United States.
______ opinions on the schedule, we finally reached on agreement.