Direction: Sentences are given with blanks to be filled in with an appropriate and suitable word. Four alternatives are suggested for each question. Choose the correct alternative out of the four.
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Like humans, zoo animals also must have a dentist ______ their teeth.
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- to fill
- filled
- filling
- to be filled
- to fill
Correct Option: A
Here, to fill (Inf. with to) is the right usage.
