--His mother dances well.-- So _____ and so _____.
Before the first nonstop flight made in 1949,it______necessary for all planes to land for refueling.
—Have you found anything wrong with your computer? —Yes,and I was about to give it up when an idea ______to me that it may be struck by some kind of virus.
We______our breakfast when an old man came to the door.
Although there is a difference in spelling,pronunciation between American English and British English,both of the countries have much to________
—I’m sincerely inviting you to join our chess club,Mr Turban. —Thanks,but I’m not ________as any of you.