He has been studying --- morning

A from
B since
C for
D after

Correct Answer: since

Present perfect continuous tense এ point of time বুঝালে preposition since হয়। প্রদত্ত বাক্যে morning দ্বারা point of time বুঝাচ্ছে। সঠিক উত্তর - since.
Bissoy MCQ

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