Câu hỏi:

He says he'll tell the authorities but it's just an empty ______.

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

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

In the movie, he plays a concerned and _______ father trying to bring up two teenage children on his own.

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

Select the synonym of the following bold and underlined word in each sentence in the unit

To conserve electricity, we are cutting down on our central heating.

Choose the word whose underlined part has a different pronunciation from the others in each group