Information and IdeasMediumMain idea of a passage on a habit's cost
Information and Ideas practice question
Leaving devices on standby seems harmless, and for any one household the cost is small, a few pounds a year. Multiplied across a country of thirty million households, however, standby power adds up to the output of a medium-sized power station running all year.
Which choice best states the main idea of the text?
- A. Standby power costs little per household but a great deal in total across a country.Correct
- B. Standby power is a major expense for each household.
- C. Devices on standby use no electricity.
- D. A medium-sized power station serves thirty million households.
Answer: A. Standby power costs little per household but a great deal in total across a country.
Small each, large together.
Why the other answers are wrong
- B. Standby power is a major expense for each household.
- A few pounds a year is small.
- C. Devices on standby use no electricity.
- They use a little.
- D. A medium-sized power station serves thirty million households.
- The station is a comparison for the standby total, not a description of what it serves.
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