—when you leave the office,make sure the door ---- _ok,I will A,was locked B will be lockedC should be locked D is locked 说明原因

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—when you leave the office,make sure the door ---- _ok,I will A,was locked B will be lockedC should be locked D is locked 说明原因

—when you leave the office,make sure the door ---- _ok,I will A,was locked B will be lockedC should be locked D is locked 说明原因
—when you leave the office,make sure the door ---- _ok,I will A,was locked B will be locked
C should be locked D is locked 说明原因

—when you leave the office,make sure the door ---- _ok,I will A,was locked B will be lockedC should be locked D is locked 说明原因
B 原因:将来时,门是被锁的,因此要用被动