He used somebody else's invitation card to get into the party, and nobody would have known if Cathy had not blown the gaff.

他利用别人的请帖混入了那个聚会，如果不是凯西说出真情，谁也不知道这回事。

youdao

He used somebody else's invitation card to get into the party, and nobody would have known if Cathy had not blown the gaff.

他利用别人的请帖混入了那个聚会，如果不是凯西说出真情，谁也不知道这回事。

youdao