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

How long did Ms. Makestos work at International Films？A．One summerB．Three summersC．One yea

How long did the meeting last？A．B．C．D．

How long will the volunteer spend on math each week if teaching both math and English？A．On

How did Anne teach Helen Keller to read？A．She spoke out loudly when she wrote the letters.

How long did the extreme weather in France make the passengers trapped under the English C

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