---When was Tom bitten by a snake?---It was on a Sunday _______ he was taking a trip to the mountainous area.
The teacher assigned the task to the three boys and ________ did his share.
If you don't go after what you want, you will never have ________.
—What are you two whispering about over there? —Oh, ________. Just small talk.
—What do you think of modern music? —It is often considered not as good as ________ of the past.
A US report predicts that in 15 years' time the economy in Asia will be larger than ________ of North America and Europe combined.