At first the experiment went on well, but ______ problems we hadn’t expected turned up later and it failed.
After decades of effort, the city is still trying to _____ how to ban smoking in public places.
It was on ________ Saturday in _______ July of 2009 that the famous scholar of Chinese traditional culture, Ji Xianlin, passed away.
When she was doing the cleaning yesterday, Mum found the ring that she _____ years ago.
--- Was he sorry for what he'd done? --- _____________.
Neither side is prepared to talk to ________ unless we can smooth things over between them.