49. People believed that the government was carrying out a big project in Hanoi. A. It is believed that the government was carrying out a big project in Hanoi. B. It was believed to be carrying out a big project in Hanoi by the government. C. The government is believed to be carrying out a big project in Hanoi. D. The government was believed to be carrying out a big project in Hanoi. 50.They have worked in that company since 2001
