Choose the underlined part that needs correcting in each sentence below. 31. The 2016 Summer Olympics was a major international multi-sports event celebrated in Rio de Janeiro, Brazil, from 5 August to 21 August 2016. A. was B. multi-sports C. celebrated D. to 32. We invited a rock star to our talk show, but be didn't turn down. A. invited B. to C. but D. turn down 33. My sister has achieved many prizes and awards in literature because of she is really talented. A. achieved B. in C. because of D. talented 34. Pho is one of most popular specialties of Vietnam. A. is B. of C. most popular D. specialties 35. Tug in war is a common game among Vietnamese children. A. in B. is C. common D. among ( Giải thích kèm dịch nếu đc ạ )