They / think / visit / Mai Chau / this / time / year / be / best23/38They / think / visit / Mai Chau / this / time / year / be / bestThey think that visit Mai Chau at this time of the year is the best They think that visiting Mai Chau at this time of the year is the best They think that visiting Mai Chau at this time of year is the best They think that visiting Mai Chau at this time the year is the bestGiải thíchĐáp án đúng là B