下列句子中加点词语解释不正确的一项是（ ）

When he _____ the door, he found his keys were nowhere. [ ]

Will you take part in Mary’s birthday party— I’v no idea. But if Lucy doesn’t go there, _________.

It was several minutes _______ we realized what washappening~our dog was trapped in a newly-dug tunnel.

lassroom looks like a mess!– Yes, but who left the waste paper ______around