Those who continuously acquire new knowledge that they can ______ their work are more likely to succeed.
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.
Chemical pollution will bring about a threat to agriculture and food chain, and ________ to human health.