【正确答案】 C

【答案解析】[解析] 画线词regain为动词，意为“恢复，重新获得”。A项keep意为“保存，遵守”；例：We tried to keep him alive but to no avail. 我们全力抢救他，但却无济于事。B项lose意为“丢失，错过”；例：An army swollen with pride is bound to lose. 骄兵必败。C项recover意为“恢复，重新获得”；例：Many people needed a couple of days to recover from the tragedy. 许多人需要好几天才能从悲剧中恢复过来。D项get意为“使得，获得”；例：I don't want to get into a wrangle with the committee. 我不想同委员会发生争执。故本题选C。