We have reached a stage we will never give in.
---Peter, you set down the result of the experiment, ___________? ---Oh, yes, but I need to find my pen first.
Rio De Janeiro, ___________the right to host the 2016 Olympic Games, will be occupied in building stadiums.
There is growing tendency among middle-school students___________they will do some voluntary work during their vacation.
---Will you set out to carry out the project? ---Yes. We have already___________ most carefully the time and money needed to complete it.
___________the rough weather and traffic, rescue teams and relief supplies have managed to reach the quake-stricken area.