____________ the Roman numerals, the Arabic numbers are rather simple to use.
He looks younger ______ his friend; in fact, he is three years senior _______ his friend.
They had just finished the work _______ there was another one waiting for them.
So far all cloned animals have suffered from some different serious disorders, ______ dying soon after birth.
We have to give the users something new ________ what we’ve already offered, which is the only way to broaden the appeal of the website.
Only latelyabout the dark secrets behind the seemingly-happy marriage of the golf star Tiger Woods.