(单选题)80: He had little trouble ______ mathematics. A: in learning B: to learning C: at learning D: to learn ...

(单选题)68: She got two pounds a month for ______ fifteen rooms. A: looking at B: looking after C: looking for D: looking around ...

(单选题)62: The ease _______ which he started the engine was remarkable. A: about B: around C: at D: with ...

(单选题)56: Why have you singled me out ______ criticism? A: from B: against C: for D: as ...

(单选题)50: Each man performed his _______ task. A: disappointing B: appointing C: disappointed D: appointed ...

(单选题)44: Louis was asked to clean the classroom ______. A: of herself B: by her will C: with one hand D: all by herself ...

(单选题)38: A sudden report______ like the sound of a car backfiring. A: rang in B: rang out C: rang up D: rang through ...

(单选题)32: You should abide _____ your promise as a man of honor. A: to B: for C: with D: by ...

(单选题)26: Mary's hat is ______ Jane's. A: familiar to B: similar to C: familiar with D: similar with ...

(单选题)20: It has been twenty years _____ the Browns settled down in Chin A: until B: since C: before D: when ...