Điền giới từ:
a,Mrs.Lien said you could reach her..........
....8 603 312.
b,We all agreed..................their request for a full investigation.
Đặt câu hỏi cho từ gạch chân:
a, He worked with deaf-mute.
b, They demonstrated the telephone to the public.
c, Alexander Graham Bell invented the telephone.
d, Marie Curie was born in Poland.