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Is ____ easy _____ out the maths problem?Yes.You can work it out in three minutes.A.this；to work b.this；working C.it;working D.it；to work说明原因
题目详情
Is ____ easy _____ out the maths problem?
Yes.You can work it out in three minutes.
A.this；to work b.this；working C.it;working D.it；to work
说明原因
Yes.You can work it out in three minutes.
A.this；to work b.this；working C.it;working D.it；to work
说明原因
▼优质解答
答案和解析
D
it是形式宾语,指代work out the maths exam
后者要跟to do sth
it是形式宾语,指代work out the maths exam
后者要跟to do sth
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