1. The students at the Imperial Academy were carefully ___ for the National examinations first, and then the Royal examinations.

   • Answer: prepared
     Explanation: "Prepared" is the most appropriate choice here because it refers to getting ready for the exams.

2. The Imperial Academy was ___ young men for the country.

   • Answer: used to educate
     Explanation: "Used to educate" is the correct phrase indicating the purpose of the academy, which was to educate young men.

3. Students at Oxford University, ___ by famous lecturers and tutors in many departments.

   • Answer: are taught and supported
     Explanation: The correct passive structure is "are taught and supported" because it refers to what is done to the students.

II. Supply the correct passive form of the verbs in brackets:

1. Burj Khalifa in Dubai, the highest building in the world, (open) ___ in 2010.

   • Answer: was opened
     Explanation: The past passive form is "was opened" because it refers to an action that happened in the past.

2. A painting by Picasso (sell) ___ for 3 million dollars last year.

   • Answer: was sold
     Explanation: "Was sold" is the correct past passive form.

3. The Japanese Covered Bridge in Hoi An (build) ___ in the 16th century.

   • Answer: was built
     Explanation: "Was built" is the correct past passive form.