21. —______
—He’s gentle and easygoing.
A. Who is your brother?
B. Who is your brother like?
C. What is your brother like?
D. What does your brother look like?
22. After ______ while, the manager drew ______ conclusion that they wouldn’t take the risk of buying this dying factory.
A. a; a B. a; the
C. 不填; a D. 不填; the
23. None of the travelers paid attention to the advice ______ by the villager and got lost in the forest.
