exercises: 1.not until all the fish died in the river_____ how serious the pollution was. a.did the villagers realize b.the villagers realize c.the villagers did realize d.didn’t the villagers realize 2.it was not until 1920____ regular radio broadcasts began. a.while b.which c.that d.since 3.i finally got the job i dreamed about. never in all my life_____ so happy. a.did i feel b.i felt c.i had felt d.had i felt 4. — why can't i smoke here?
