— What a shame ! It turned out to be a failure.— We missed a process,_______ we could not succeed in the experiment.
Fortunately we had a map, without _____ we would have got lost.
Two years later, her father disappeared, never to be _________ again.
We want to encourage the students ________ the teaching.
What he said was not relevant _________ the matter in hand.
Those _________may leavetheclassroomnow.