It is ()deep regret that we have to report the death of the pupils.A.to B.ofC.withD.in 说明理由,
问题描述：
It is ()deep regret that we have to report the death of the pupils.A.to B.ofC.withD.in 说明理由,
答
B be of deep regret=be deeply regretful 深表歉意
像这样的 be of +名词 =相对应的形容词
例如be of use =useful
be of value=valuable
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答
C
with deep regret 深深的遗憾
全句是个“It is+ 强调部分 +that ...“的强调句型