问题补充:
一You’ve made great progress in your survey, haven’t you?
——Yes,but some problems among the youngsters still remain——.
A. settled
B. settling
C. to settle
D. to be settled
答案:
A. settled
B. settling
C. to settle
(答案→)D. to be settled
解析:可联系答.案.网客服索取。
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