On a rainy day I was driving north through Vermont, ______ I noticed a young man holding up a sign _____ “Boston”.

The woman ________ when she saw the boy in the shop.

____is well-known to all, the great changes have taken place in China.

A charity campaign to offer care to the elderly in our city attracted many participants on March 5 —-“Learn from Lei Feng Day”, a day _________ to honor the spirit of helping others.

You can see quite a few _______ in the Carrefour supermarket nearby.