During the Second World War, once before, the U-boats had been _____ because of air attack.
We must keep our room clean, for dirt and disease go______, you know.
To their great relief, the missing child returned home, ______, after an absence of two weeks.
Have your working conditions improved? ---No, ______than before, I’m afraid.
The task is too much for me, so I can’t carry on ______any longer. I must get some help.
I haven’t seen______ this since I collected stamps.