A. Electronic dictionaries which can be very easily downloaded into your personal electronic device are now common in English classes.
B. Electronic dictionaries, which can be very easily downloaded into your personal electronic device, are now common in English classes.
C. Electronic dictionaries, that can be very easily downloaded into your personal electronic device, are now common in English classes.
D. Electronic dictionaries can be very easily downloaded into your personal electronic device are now common in English classes.
B
Electronic dictionaries => danh từ chỉ vật
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