I found it very hard to ________between the two sounds.
Đáp án đúng: A
* differentiate /,difə'renʃieit/ (v) phân biệt
EX: it ‘s difficult to differentiate between the two varieties.
*pick (V) chọn lựa kĩ càng
EX: she picked the best cake for herself
* discern /di'sə:n/(v): nhận ra, thấy rõ
Ex: it is possible to discern a number of different techniques in her works.
*tell(v): nói, bảo
Đáp án A ( tôi cảm thấy rất khó để phân biệt giữa 2 âm thanh)