10.-Have you been to the Great Wall?-Perhaps not in my memory. _______ , it might have been during my early childhood.
To see if his new bike works properly, Jane could hardly wait to _____.
The doctor told me that you just had a strange cold , so you can______.
Had it been possible I would have gone to the movies but I _____ busy.
_____ your advice, I would have had no trouble with my papers.
You’d better not bring your small son along, for this party is _____for only adults.