It is the prevention of disease______its successful treatment that has led to the rapid increase of the world’s population.
I like these English songs and they ________many times on the radio.
—Did you see a man in black pass by just now?—No, sir. I ________ a newspaper.
-----Did you watch the basketball match yesterday?-----Yes, I did. You know, my brother ________ in the match.
He hesitated for a moment before kicking the ball, otherwise he ______ a goal.
--- Why is Jenny still standing there? It’s so cold.—She _____ for someone.