问题
选择题
| I have heard these sons and daughters say they never fully appreciated their parents _____ it was too late to tell them. |
A. as B. that C. until D. when |
答案
答案：C
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| I have heard these sons and daughters say they never fully appreciated their parents _____ it was too late to tell them. |
A. as B. that C. until D. when |
答案：C