问题
选择题
（福建泉州一中高三期中，34）Only when their children leave home _________.
A．many parents did feel a sense of loss
B．did many parents feel a sense of loss
C．did feel many parents a sense of loss
D．do many parents feel a sense of loss
答案
答案：D
句意：只有当孩子们离开家时，许多父母才感到有种失落感。考查Only+when从句放在句首时，用部分倒装。