---He didn’t go to the concert yesterday, did he? ---_______, he was studying for the tests all day.
Not only ______ interested in the football but _______ beginning to show an interest in it.
_______that all mountain roads were closed.
Only when the government increases affordable homes for low-income groups________.
On the chairs _________ , who had come to Dalian looking for jobs.
Not until about 2000 BC________________________done.