Please excuse me _______ your letter by mistake.
31.—Can you tell me what time the flight to Detroit leaves? —I'm sorry, but it ______.
30.Napoleon would have taken over the world if he ______ the Battle of Waterloo.
29.—How did he break his head while swimming? —______ my warnings, he dived straight into the shallow water.
28.You ______ very fast if you went from New York to Boston in six hours.
27.—Do you know when Phil's coming? —He ______ 4: 00.