Your essay is quite good: just it with a few illustrations and quotations.
A. leave .. out
B. touch .. up
C. cut .. out
D. write .. off
网友回答
A. leave .. out
(答案→)B. touch .. up
C. cut .. out
D. write .. off
解析：考查动词短语辨析。touch up润色，修饰；依据句意“你的文章很好；只要用些例证和引语修饰一下”。故选B；put up遗漏；cut out 删掉；write off报销，勾消。