.B1. It was quiet _ those big trucks started coming through the town. A. before B. after C. until D. unless2. It seemed only seconds _ the boy finished washing his face. A. when B. before C. after D. even if3. Hardly had he reached the school gate _ the bell rang. A. while B. when C. as D. as soon as4. We were told that we should follow the main road _ we reached the central railway station. A. whenever
