Fifty miles __ not a long distance.
are
is
Correct
have been
were
Explanation:
Correct Answer is: is
Fifty miles is a long distance.
এখানে Expressions of time and distance are treated as single entities so they don`t take plural verbs: twenty miles, six days, two minutes, four meters etc – all take singular verbs.
সুতরাং সঠিক উত্তরটি হবে – Fifty miles is not a long distance.
SOURCE: Advanced Learners Communicative English Grammar and Composition With Solution (For Class 9-10)