How long has Ethbell taught minority students?A.8 years.B.20 years.C.16 years.D.30 years.

How long has Carlos been in business？A．Four years.B．Eight years.C．Thirteen years.D．Thirty

听力原文：M: Now, then, Mrs. Darcy. How long has this tooth been giving you trouble？W: Well

听力原文：M: Now, then, Mrs. Darcy. How long has this tooth been giving you trouble？W: Well

How long has the woman been working at this job？A．One monthB．Two monthsC．Three monthsD．Fou

How long did Ethbell teach minority students？A．8 years.B．16 years.C．20 years.D．30 years.

How long has Bryant been wearing No.8?A.Since he