"They have been waiting ___ two hours." — सही पूर्वसर्ग (preposition) चुनिए।

उत्तर: B'For' is used with a period of time (two hours, three days). 'Since' is used with a point in time (since Monday, since 2020). Both are used with perfect/perfect continuous tenses.

Level 2Easy
"They have been waiting ___ two hours." — सही पूर्वसर्ग (preposition) चुनिए।
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