他们把棺材降入坟墓中。

They ___lowered the coffin into the grave.

由于现在怀孕很重，她小心翼翼地把自己降到椅子上。

Heavily pregnant by now, she ___lowered herself carefully into the chair.

他看到我时，尴尬地低下了眼睛。

He ___lowered his eyes in embarrassment when he saw me.