It's n____ for you to study hard if you want to get good grades
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![It's n____ for you to study hard if you want to get good grades](/uploads/image/z/4151006-62-6.jpg?t=It%27s+n____+for+you+to+study+hard+if+you+want+to+get+good+grades)
It's n____ for you to study hard if you want to get good grades
It's n____ for you to study hard if you want to get good grades
It's n____ for you to study hard if you want to get good grades
necessary
必要的
necessary.
necessary