1. Had he been waiting for three hours? (wait)
2. Your friends had been studying at this university for five years. Was it difficult? (study)
3. Had anybody been smoking? I could smell cigarettes. (smoke)
1. Had he been waiting for three hours? (wait)
2. Your friends had been studying at this university for five years. Was it difficult? (study)
3. Had anybody been smoking? I could smell cigarettes. (smoke)