There _____ a lot of coal mines in the south, but many of them have been closed or are _____ be closed.

下列各句中，加点的词语运用正确的一项是（ ）

When shall we meet again, Jerry? Next Saturday or next Sunday?—It’s up to you. Both________ me fine.[ ]

—She couldn’t have done that sort of thing—Whatever she did was reasonable,_____ to what you didBesides,it’s none of your businessGet down to_____ your lessons[ ]

They don’t know _______ their parents are