Excel formula fill range formula with dynamic result

[qazzzlyt]

A1 has formula ={"dog","cat"}, which filled B1 with "cat".

In A3 the formula is =CHOOSE({1,2},A1,B1), and it worked. My goal is to fill multiple cells with one cell and need dynamic result. So this one meet my goal, but I feel CHOOSE is redundant and there should be a better way.

So I write A5 as ={A1,B1}, but Excel does not recognize this formula. What did I do wrong here? Any suggestions with good grammar?

Thank you all for help.

[#2]

@qazzzlyt 

Perhaps

=$A$1#

[#3]

Oh thanks again Sergei. How about if A1 and B1 are not in a spilled range?

[#4]

@qazzzlyt 

=A1:B1

shall work both for spill and range

[#5]

@qazzzlyt 

At the risk of muddling up your cats and dogs

= IF({0,1},"dog","cat")

 is also a standard solution.  Of course. if you are up for a bit of excitement, you could always try

= LET(
    select, RANDARRAY(1,2,0,1,1),
    IF(select, "dog","cat"))