—Have you finished your experiment report, Jane?—Oh, my God. I’ve _____ forgotten all about that.
. He made _____ known to his friends that he didn’t want to enter politics.
. It used to be thought _____ the Earth was flat.
. In the west, people make _______ a rule to send Christmas present to their relatives and friends.
. _______ is well known, _______ Hong Kong returned to China on July st, .
. _______ was known to them all that William had broken his promise ______ he would give each of them a gift.