Question

he heard the news.He became sad​

Answer 1

Answer: The correct answer to this should be- (I am guessing this from an excercise of joining sentences without and, but and so)

Upon hearing the news, he became sad.

The word 'as soon as' can be also used-

As soon as he heard the news, he became sad.

You can choose any of the two options.

Hope it helps you:)

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