Building dams provides a great number of ______ benefits. 

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You may find doing this job very _______. Try it!

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Kate Bouman is ______ scientist whose algorithm allowed researchers to take _______ first ever image of a black hole.

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If a machine stops moving or working normally, you can say that it has ______ .

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The fire was so important to early cultures that scientists now study it to learn more about ancient civilizations.

Choose the word OPPOSITE in meaning to the underlined part.

This task is not rocket science. Just focus on observing this reaction and you can reach a conclusion on chemical properties of bronze.

Choose the word OPPOSITE in meaning to the underlined part.

Vietnamese have a strong sense of hospitality and feel embarrassed if they cannot show their guests full respect by preparing for their arrival.