85. Father was very excited to hear the news/when he heard the news.
at the news/(on) hearing the news
86. There is no rainbow without wind and rain.
How can you see the rainbow without going through the storm?
87. It is known to all that his success is entirely/totally/completely due to his hard work.
/As is known to all, his success is entirely/totally/completely due to his hard work.
/We all know that his success is entirely/totally/completely due to his hard work.
88. When you doubt yourself, don’t forget that it is the most important (thing) to build up self-confidence.
89. In order to accomplish/finish/complete the task in time, the volunteers are trying their best/doing all that/what they can to simplify the difficult/complicated matters.
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