17. You should not underestimate her achievement. It _____ a lot of efforts _____ a new company.
(A) take... establishing
(B) have taken... to establish
(C) takes... to establish
(D) taking... establish
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統計: A(0), B(0), C(1), D(0), E(0) #3360192
統計: A(0), B(0), C(1), D(0), E(0) #3360192