—May I remind you that a Mr. Wang is waiting outside, sir?

       —Oh, that’s right. I __________ about it.

A.forget             B.had forgotten        C.forgot               D.have forgotten

—May I remind you that a Mr. Wang is waiting outside, sir?

         —Oh, that’s right. I ________about it.

   A．forget  B．had forgotten    C．forgot         D．have forgotten

—May I remind you that a Mr. Wang is waiting outside, sir?

—Oh, that’s right. I      about it.

A．forget                        B．had forgotten       C．forgot                 D．have forgotten

  —May I remind you that a Mr. Wang is waiting outside, sir?

       —Oh, that’s right. I      about it.

   A．forget B．had forgotten   C．forgot       D．have forgotten

—May I remind you that a Mr. Wang is waiting outside, sir?

       —Oh, that’s right. I      about it.

   A．forget                   B．had forgotten       C．forgot                 D．have forgotten