Mary got the first prize in the National Math Competition, ________, for sure, delighted everyone.
Eating too much fat can ______ heart disease and cause high blood prssure.
_____into the house, the thief was soon caught by the police.
In such a fierce competition, a person has to make every effort if he ______.
Only when ______ possible to settle the problem.
I was told that there were about 50 foreign students ____ Chinese in the school, most _____ were from Japan.