287. The clear colorless liquid that falls as rain, fills lake and rivers, and is necessary for life to exist is______.
Although she ______for a moment about the job,she finally accepted it considering the benefits of it.
_____several times,but unfortunately,the boy still couldn’t smooth away the problem on his own.
_____herself wondering whether she had made a mistake, she felt embarrassed and at a loss.
____ with a camera a compass and several maps , the scientists set out to explore the ancient forest.
----- She doesn’t play the piano, but she likes singing and dancing.-----_________.