You ______ the air pressure in your tires if you do not want to get a flat tire on your trip. A. should be checked B. do not have to check C. mustn’t check D. ought to check
You ______ the air pressure in your tires if you do not want to get a flat tire on your trip.
A. should be checked
B. do not have to check
C. mustn’t check
D. ought to check