.I need one more stamp before my collection ____.A.has completed B.completes C.has been completed D.is completed

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.I need one more stamp before my collection ____.A.has completed B.completes C.has been completed D.is completed

.I need one more stamp before my collection ____.A.has completed B.completes C.has been completed D.is completed
.I need one more stamp before my collection ____.
A.has completed B.completes C.has been completed D.is completed

.I need one more stamp before my collection ____.A.has completed B.completes C.has been completed D.is completed
D 前后时态一致,且用被动语态.因为COLLECTION没有执行能力.