a student,though intelligent ,must study hard

a student,though intelligent ,must study hard _____ a student,you must study hard. （）a student ,we must study hard As a student, you must study hard. as a student, -----a student,you must study hard at your lessons _____ a student,I must study very hard. ( )a student,you should study hard. 这题怎么错了You must study very hard at school for a student,回答并更正 I must study hard? As a student,he is often told __ (study) hard. Every student __________ hard.A.study B.studies C.studying I am a student, my duty is study hard.