Researchers have found clear and convincing evidence ________ happiness is the key to better health and longer lives.
Nowhere else in the world __________ more friendly people than in China.
Come and see me whenever __________.
The school has __________ a special class to help poor readers.
Eating too much fat can __________ heart disease and cause high blood pressure.
The gentleman the little children followed suddenly stopped and looked as if __________ whether he was going in the right direction.