It is no use _________ to persuade him ________ smoking because he has been addicted to it since he wasyoung.
—Let's have a game of tennis; the loser has to treat the other to a hot dog.— .
His uncle went abroad in 2010, and _______since.
Only by seizing every possible_____ to practice can you possibly hope to improve your spoken English.
—Why do many people keep dogs as pets?—Because they are our ____ friends and they never desert their masters.
The survey ____ in our school last month shows that about three percent of the students are addicted to the Internet games.