_________ Mr. Pennington retires, he will receive an annual pension of more than fifty thousand dollars from Packard Incorporated.

2023-05-26

A. Often
B. Once
C. Whoever
D. Sometimes

参考答案:B

彭宁顿先生一旦退休,将每年从帕卡德股份有限公司获得超过五万美元的退休金。横线处应填入引导状语从句的连词。备选答案中只有once是连词,故选8。

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