If you lose 1kg a week,

pu1. average, ordinary, usual, normal, regular, general, common

2020-02-01

OK

pu2. I think it's appropriate

2020-02-01

OK

pu3. I lost that much weight when I was overweight

2020-02-01

OK

pu4. I think it's normal

2020-02-01

OK

pu5. Moderate! I lost that much weight in the beginning, too

2020-02-01

OK