I was leaving the office when it suddenly 　　　 to me that I had forgotten my keys.

A．struck

B．happened

C．occurred

D．hit

单项疏浚工程建设项目概算中其他费用包括（）等费用。

A.联合试运转费

B.生产职工培训费

C.扫海费

D.实船停滞

E.航道整治效果观察费