问题

It was ___ he came back from school today ___ he found his new book missing. width=”144″ style=”width:108.1pt;background:white;padding:0cm 5.4pt 0cm 5.4pt”
A:when; then
B:not; until
C:not until; that
D:only; when
B:not; until
C:not until; that
D:only; when
正确答案是:
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