I can’t solve the math problem because it is too difficult. What should I do — _________ ask the teacher for help

Who is your favorite basketball player in China? —-Yao Ming, of course No one plays __________

past few months, the country _____ a furthertightening of supply restrictions, making fuel and food supplies more difficultto obtain

Would you please drive ______? My train is leaving.—I’d like to, but safety comes first.

–Have you been wasting time oncomputer games again– _______. I’ve been studying a lot and Ineed a break.