—How long do you think it will be ________ we win the football World Cup? —Perhaps twenty years.
The ordinary house _________ we visited three days ago used to be the house of Victor Hugo, a well-known litterateur(文学家).
—Bob, you’re absent-minded! —Oh, I’m sorry I ______ attention to you, Miss Shute.
With everything important _______, my father is now lying on the beach, enjoying the bright sunshine and fresh air.
The man as well as his parents ____________ content with the dishes his wife cooks.
Charlie Chaplin found __________ difficult to entertain the audience at first.