答案:C
When Tom got to the examination room, he realized he ______ his pen at home.
A.was leaving
B.had left
C.forgot
D.was forgetting
有压进水口的特征是进水口高程在水库( )以下。
A.校核洪水位
B.死水位
C.设计洪水位
D.防洪高水位