The door opened and a big-eyed girl came in, carrying a cake with two _______ candles on it.
He is only too ready to help others, seldom, ________, refusing them when they turn to him.
A recent study has found that the number of smokers ________ sharply over the past five years.
How close parents are to their children ________ a strong influence on the development of the children's characters.
—Was it at 11 o'clock ________ your father came back last night? —Yes, he is always coming back so late.
Scientists are still wondering ________ the Egyptians built the pyramids so long ago.