Drinking milk every day is good ___ our health. [ ]

Daming didn’t take a photo in the museum. I didn’t, _______

Have you seen______ pen? I left one here this morning.— Is it___________ black one? I think I saw it somewhere.

We had a lot of delicious food ______ the picnic. [ ]

After that, he knew he could _______ any emergency by doing what he could to the best of his ability.