you been to the Great Wall– Perhaps not in my memory. _______, it might havebeen during my early childhood.

When Tony came to himself, he found himselfto a big pole in a dark house

At the beginning of the school term, our teacher told us that every student should get on with each other ___________.

Will you see the film Cinderella with us tonight—No. Thanks. I ______it last week.

Many difficulties have _____ as a result of the change over a new type of fuel.[ ]