Whether he could do it or not with a rider bearing down on him was unknown but they would both find out.
He wasn't sure if he could do it with a rider bearing down on him but they would both find out.
He didn't think he could do with it a rider bearing down on him so he gave up.
A man is preparing to eat.
They do not have a problem retaining talented workers.
Future emissions and air quality have valid forecasts.
Most of the students on campus study and do research work on the weekends I think.
In 1960, the World Book said that space conquest had accelerated tremendously in the previous three years.
I don't think it will ever happen in a rapid change.