Ioftenhearquiteafewsonsanddaughterssaytheyneverfullytha...

问题详情：

I often hear quite a few sons and daughters say they never fully thanked their parents ________it was too late to tell them.

A．until                                                      B．after

C．when                                                     D．as

【回答】

A

知识点：连词

题型：选择题