

Since then, there have been a great many groups that have achieved enormous fame, so it is perhaps difficult now to imagine how sensational The Beatles were at that time.
Cái đoạn "a great many groups" là s vậy ạ? Đã có "a" rồi mà đằng sau "many groups"
Cái đoạn "a great many groups" là s vậy ạ? Đã có "a" rồi mà đằng sau "many groups"