. The report about the ______ surprised all the ______.
The experiment turned out to be______failure, but “_________failure goes before success” A a , a B /, / C a , / D / , a
Was it because his mother was ill ______ he didn’t go to school?
Our teacher asked us to give all the used books to ______ needed them.
We have got plenty of time. We ______ hurry.
—Do you mind if I keep pets in the building?—______.