Pick the incorrect part in the given sentence.
The tour guide warned us / that on this mountain road / four hours are a long time / to travel without a break.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → four hours are a long time
Here “four hours” is one stretch of time taken as a whole. It is not four separate hours. An amount of time, money or distance seen as one sum takes a singular verb. The words “a long time” also show that it is one amount. So the verb must be is, not “are”.
Option 1: The tour guide warned us — No error.
Option 2: that on this mountain road — No error.
Option 3: four hours are a long time — Error. “four hours are” should be “four hours is”.
Option 4: to travel without a break — No error.
Corrected: The tour guide warned us that on this mountain road four hours is a long time to travel without a break.