Circle the correct answer A, B, C or D.

The public suggested that the factories ………. with waste treatment system.

Circle the correct answer A, B, C or D.

Trang An Landscape Complex is renowned for its diverse ecosystem, unique natural beauty and ……. characteristics.

Circle the correct answer A, B, C or D.

The towers of the My Son sanctuary are the most significant ……. of the My Son civilization.

Circle the correct answer A, B, C or D.

A ............... is a building or place that has been made stronger and protected against attack.

Circle the correct answer A, B, C or D.

The local government suggested ……. a road through the Nam Cat Tien National Park.

Circle the correct answer A, B, C or D.

It …………that some foreigners had collected rubbish on Cat Ba Beach.

Circle the correct answer A, B, C or D.

It ………that China dug up the ocean floor to build artificial islands.