21. Last night he saw two dark ______ enter the building, and then there was the explosion.
A) features      　B) figures        C) sketches        D) images

22. It is obvious that this new rule is applicable to everyone without _______.
A) exception  B) exclusion      C) modification     D) substitution

23. His temper and personality show that he can become a soldier of the top ­­­­_____.
A) circle     B) rank           C) category        D) grade

24. During the lecture, the speaker occasionally _____ his point by relating his own experiences.
A) illustrated  B) hinted         C) cited           D) displayed

25. Only those who can _____ to lose their money should make high-risk investments.
A) maintain   B) sustain        C) endure          D) afford

21.B) figures    22.A) exception    23.B) rank    24.A) illustrated    25.D) afford