48. I am used.... in crowed palces.
ব্যাখ্যা: The correct completion of the sentence is: "to studying." So, the complete sentence is: "I am used to studying in crowded places." Explanation: The phrase "used to" followed by the gerund form of a verb ("studying") indicates a habitual action or something one is accustomed to doing. In this context, "studying" is the gerund form of the verb "to study," which functions as the object of the preposition "to" after the phrase "used to." Therefore, "to studying" is the appropriate completion to convey the intended meaning of being accustomed to studying in crowded places. [তথ্যসূত্রঃ Master English]