问题
选择题
It's exciting to be a chairperson, but I'm________ my ability to do all the extra work. [ ]
A. looking about
B. learning about
C. quarrelling about
D. worried about
答案
答案：D
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It's exciting to be a chairperson, but I'm________ my ability to do all the extra work. [ ]
A. looking about
B. learning about
C. quarrelling about
D. worried about
答案：D