David rode so fast that he couldn’t hitting a passer-by and he fell off the bike.
_______ the rain falling so hard, it becomes more and more difficult to carry on the rescue work.
Chinese President visited AIDS patients in Beijing's Ditan Hospital on the World AIDS Day, ________ was on Dec.1,2010, and ______ theme was to give all the AIDS patients medical care.
We had wanted to finish our task by noon, but it didn’t quite _____________ as planned.
____our mother will allow ____ to see a film after supper?
We used to see each other _____, but haven’t heard from him since last year.