admitted doubted remembered
The student said OK and then he walked straight ahead to the grassy field.A few minutes later,the student came back empty-handed.When the teacher asked the  reason  ,the student said,"On my journey,I found quite a few beautiful blades of grass,but I  [MASK]  that I would find a better one,so I didn't pick it.But I didn't realize that I was at the  end  of the field,and I hadn't picked any because you told me not to go back,so I didn't go back."