I don't quite understand the part in the bracket, what role does it play? It says what situation he is indifferent to. The expression is indifferent to is usually followed by an indirect question, just as its synonym doesn't care is also followed by an indirect question.
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yzh19781 He is indifferent to (who wins or loses).I don't quite understand the part in the bracket, what role does it play?It says what situation he is indifferent to.
yzh19782 This is the first time (that ;when) he saw her.Can (that,when) be ommitted? Or only "that" can be used here ?Use either 'that' or nothing at all. Don't use 'when'.