Just like fingerprints, each person’s DNA is ________ unless he has a twin.[ ]

Why do you drink so much coffee? — Well, ________ it doesn’t keep me awake at night,I see no harm in it.[ ]

Can you be honest aboutit would take to defend yourself against a gun attack?

A computer can’t remember who ; it simply does what .

You may arrive in Beijing early _____ youmind taking the night train.