We haven’t seen each other ________ a long time.
Not until____________the exam _________ the importance of doing homework.
I’m not sure whether be has finished writing the book, but he________ it last month.
I’ll never forget our English teacher, _________ is a well-educated teacher, _________ we admire very much.
With drink and food _________ , the farmer had to walk out of the cave.
It’s high time he _________ the right measures; otherwise, he’ll fail.