Câu hỏi:

Man and most animals need a constant supply of water to live.

Each year about fifty hundred species of plants and animals are already being eliminated.

This is especially worrying when there are about 3,000 plants with values as medicines against cancer, AIDS, heart disease and many other sicknesses.

Choose the best answer A, B, C or D for each sentence

The bridge is a marvelous work of engineering and _______.

Choose the word whose main stress is placed differently from the others in each group

Work on the production line is monotonous and lacks _______.

This is especially worrying when there are about 3,000 plants with values as medicines against cancer, AIDS, heart disease and many other sicknesses.