问题
选择题
This kind of exercise is most _______, and therefore is a good test of your students’ ability.
A．surprising
B．encouraging
C．exciting
D．challenging
答案
答案：A
考查形容词的用法：A. surprising惊人的，B. encouraging令人鼓励的C. exciting令人兴奋的 D. challenging有挑战的，句意是：这种练习是最有挑战的，因此是检测学生能力的很好的办法。选A。