1). XYZ2). YZX3). ZXY4). YXZ

1.	1). XYZ2). YZX3). ZXY4). YXZ
Answer» The sentence begins with an assertion and therefore the word 'that' must be USED and therefore the SECOND sentence should be Y. Now, Y ends with 'time' and Z begins with 'zone' which would automatically act as a clue so as to FORM the phrase 'time zone'. This would make Z the THIRD sentence and by that extension X would become the fourth sentence.

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