A 「宿題はもう出しましたか」
B 「いいえ。昨日宿題がありましたか。私は___」
- 知りませんでした
- 知っていませんでした
- 覚えません
- 覚えませんでした
I am a little confused because I don't quite catch the difference between the first two options. There was a similar exercise before and I think I ended up using the -te imasu form but now I am doubting it. They give us a lot of multiple choices with all the grammar until now (N5, although sometimes there are from upper levels in-between) and for some reason they are all hiragana.