Giúp mình với giải thích nữa ạ 
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correction in each of the following questions.
43. I think (A) maths are (B) the most (C) difficult subject(D).
44. Hoa lives (A) near the school (B) , so she walks usually (C) to school in the morning(D).
45. Playing football (A), swimming and do karate (B) are (C) my son's favorite sports(D).
Mark tha lattar 4RCor D on vour ansuar sheat to indicate the sentence that is closest in meani