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 personally 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

DBADA