----Why did you go back to the shop? -----I left my friend _____there.
.________ surprising it is you should not know what has happened!
Not until I came home last night ________ to bed.
It was ________ he came back from Africa that year ________ he met the girl he would like to marry.
Barry must have visited the Eiffel Tower before,________he?
________,he talks a lot about his favorite singers after class.