Assume that Sheet2 is your master sheet in which the data will get added continuously...

In A1 Cell of Sheet 1

=LOOKUP(2,1/(Sheet2!A:A<>""),ROW(Sheet2!A:A))

In A2 Cell

=INDEX(Sheet2!A:A,$A$1)

Drag it to right...

So now whenever the data gets added in Sheet2 then the Last entry will reflect in Sheet1 Row 2