15. It ______ that Ha Long bay was recognized as a World Heritage Site by UNESCO in 1994. A. knows B. is known C. be known D. knew 16. The government suggested______ a number of primary schools. A. close B. should close C. to close D. closing 17. ______ the books on this shelf were written by dickens. A. Each   B. All C. Every D. The all 18. You have to move to a new school and you know nobody there. You may feel______. A. depressed   B. left-out C. delighted D. stressed

15. It ______ that Ha Long bay was recognized as a World Heritage Site by UNESCO in 1994.

A. knows B. is known C. be known D. knew

16. The government suggested______ a number of primary schools.

A. close B. should close C. to close D. closing

17. ______ the books on this shelf were written by dickens.

A. Each   B. All C. Every D. The all

18. You have to move to a new school and you know nobody there. You may feel______.

A. depressed   B. left-out C. delighted D. stressed