112. In all, 57 such trains are expected to be in ____ commercial operation by _____ end of 2009.
Once ____ in the forest, you ought to remain ____ you are waiting for help.
You will succeed in the end ____ you give up halfway.
____ made things worse, he said, was that his roommate never took part in any of the cleaning work.
Many things such as going abroad and owning a car, ____ impossible in the past, are now very common.
Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better.