—Have you been to the Great Wall?—Perhaps not in my memory. ________, it might have been during my early childhood.
I overslept this morning because my alarm clock ______.
Tony, stop playing with knife. You may get ______ .
When he came back from abroad, Joan told us about the cities and the people ______ he had visited.
The Science Museum, ______ we visited during a recent trip to Britain, is one of London’s tourist attractions.
Peter was so excited ______ he received an invitation from his friend to attend the wedding.