—Look, the paint is starting to come off ______ the wall is damp.—Well, we’d better have the wall repainted some day.
When ______ about the secret of his success, Steven Spielberg said that he owes much of his success and happiness ________ his wife and children.
To enjoy the scenery, Sara would spend long hours on the train ______ travel by air.
The audience ______ when they heard the humorous story.
— What about ______ lecture you attended yesterday? — To tell the truth, it was too boring.I can’t stand ______ lecture like that.
From time to time a crocodile has snatched someone _______ he or she is even aware that the crocodile is there.