Onlyuntilveryrecently_______possiblethatgrammariansareabletomakeaccuratestatementsabouttherulesofsomelanguages. A.hasitbeen B.ithasbeen
A.正确答案A
B.was it C.
D.it was
Onlyuntilveryrecently_______possiblethatgrammariansareabletomakeaccuratestatementsabouttherulesofsomelanguages. A.hasitbeen B.ithasbeen
A.正确答案A
B.was it C.
D.it was