_____ a student,you must study hard.

_____ a student,you must study hard. As a student, you must study hard. as a student, _____ a student,I must study very hard. -----a student,you must study hard at your lessons （）a student ,we must study hard a student,though intelligent ,must study 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 you must ___ hard when you are doing a _____ you had better study hard,_____ _____? A teacher said to a student,"You should study hard and ____ All the student must study _____(care) for the test.