Are you good_____ your classmates?[ ]

Thanks _____ them, I found my Chinese roots.[ ]

The light in his office is still on. Do you know _______?—To prepare for the material(材料) the meeting will need tomorrow, I think.

In America when you’re given a present, you can open it . You don’t have to wait.

Can I add tomatoes __ the shopping list?—No. We have some in the fridge.[ ]