43.Susan had to walk five miles back to the office after realizing she ______ her wallet there.
(A) had left (B) has left (C) have left (D) has been leaving
48.A: This traffic is unbearable. B: ______ It's taking forever to get anywhere. (A) Break it up. (B) Me too. (C) Not really. Why? (D) You can say that again.