The detective, ________ to read a newspaper, glanced at the man ________ next to a woman.
You can hardly imagine the difficulty the woman had her children.
Scientists are convinced the positive effect of laughter physical and mental health.
Playing basketball is great fun; it also provides us with a chance to develop our sense of team spirit.
It is hard to say what kind of person he is. Sometimes he is very friendly; at other times he ___ be very cold.
In my opinion, ___ matters is not one’s looks, but one’s inner thoughts.