`23. ` A. directly
`24.` B. celebrate
`25.` D. wil (câu điều kiện loại 1: If + S + V(s/es)/am/is/are + ..., S + will + V-infi + ...)
`26.` D. be bought
`27.` C. useful
`28.` D. was having
`29.` B. since (have seen `->` HTHT)
`30.` B. would be
`31.` A. do they
`32.` C. Therefore