Whenever we are in ______ trouble, we should never lose______ heart.
—Dad, I feel just relieved after the dreaded national college entrance exam. —__________.
—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.