问题补充:
Walking alone in the dark, the boy whistled to his courage.
A. hold up
B. keep up
C. set up
D. take up
答案:
A. hold up
(答案→)B. keep up
C. set up
D. take up
解析:考查动词短语辨析。难度中等。
【解题思路】句意为:独自在黑暗中行走,男孩吹口哨保持勇气。B项意为“维持,不使低落”,符合句意。A项意为“举起”,C项意为“建立”,D项意为“拿起”,都与句意不符。