发生
“在对现存事物的肯定的理解中同时包含着对现存事物的否定的理解，即对现存事物的必然灭亡的理解”。这是一种（ ）。
“在对现存事物的肯定的理解中同时包含着对现存事物的否定的理解，即对现存事物的必然灭亡的理解”。这是一种（ ）。
She was _____ at your saying that.
She was \_\_\_\__ at your saying that.
The dam was built along the river _____ floods.
The dam was built along the river \_\_\_\__ floods.
_____ his being out of town, the meeting will be postponed until next Friday.
\_\_\_\__ his being out of town, the meeting will be postponed until next Friday.
A fire _____ during the night and a large number of houses _____ to ashes.
A fire \_\_\_\__ during the night and a large number of houses \_\_\_\__ to ashes.
Something must have happened on their way. Or they _____ by now.
Something must have happened on their way. Or they \_\_\_\__ by now.