一I’m sorry! I would have taken him to hospital if I had known he was seriously ill.一But ______ .
--What did the teacher say to you just now? ---She asked me ___.
This building is ___ that one.
Will you please try to ___ the article ___ to about 3000 words?
Mother: Bob is sure ___ tonigh. Father: Don't be so sure ___ it.
We found ___ for us to finish the work within two days.