Hiking by oneself can be _______ and good for health. It may also be good for_______ training.
____ knocked down and hurt worried her friends.
So excited _____ that he couldn’t say a word.
---- What’s your opinion about it? ----You can _____at a glance that the building was poorly built.
____ it happens, her birthday is after mine.
It is such a modern machine ______ few of the workers know how to operate.