pjiang, even if you've applied another 140
the answer is still no
for this question, the answer is "yes" iif you have applied aos or immigration visa
[No] 你既沒有填過另外的 I-140,又沒有填過另外的 I-485
[Yes] 主申請人填過另外的 I-140,或副申請人填過另外的 I-485
[Yes] 主申請人填過另外的 I-140---------should be no