干式电抗器本体电抗器表面有轻微破损、脱落或轻微龟裂，开展（）类检修，适时修复，根据试验结果开展相应工作。
A.A
B.B
C.C
D.D
参考答案：C
I don't know ______ with these books.[ ]
A. how I should do
B. what I should do
C. what should I do
D. how should I do
