问题
选择题
I used to feel very nervous when I stood up in front of others, but now I feel quite ______when giving a speech to the school．
A．at random
B．at length
C．at ease
D．at sight
答案
答案：C
题目分析：考查介词短语：A． at random随意的，B． at length充分地，详尽地，最后，终于C． at ease轻松的，D． at sight一看到…就，一经要求就，一出示就，句意：过去我站在别人前面就感到紧张，但是我现在在学校演讲很放松。选C。