问题
re one is_______ the English-speakingenvironment, the better he or she will learn the language
A:used to; is usedto
B:usedto; used to
C:was used to; is usedto
D:was used to; used to
B:usedto; used to
C:was used to; is usedto
D:was used to; used to
正确答案是：
