问题补充：
So absorbed in his work that not a sound .
A. was the president; did she dare to make
B. was the president; dared she to make
C. the president was; she dared make
D. the president was; she did dare to make
答案：
(答案→)A. was the president; did she dare to make
B. was the president; dared she to make
C. the president was; she dared make
D. the president was; she did dare to make
解析：考查倒装句。句意：总统正全神贯注与他的工作，以至于她一点声音都不敢发出来。第一空是因为so…that句型中so+adj/adv放在句首，用部分倒装，第二空是否定词或者半否定词放在句首，后面使用部分倒装。故A正确。
