问题补充：
Was the test difficult? Not at all.We found
A. it very easy for doing
B. very easy to do it
C. it very easy
D. very easy for it to do
答案：
A. it very easy for doing
B. very easy to do it
(答案→)C. it very easy
D. very easy for it to do
解析：可联系答.案.网客服索取。
