_____I know she's not perfect, I do like her.
It is well known to all that water, ______ enough, can change into ice quickly.
I would love ______ to the party that evening, but I had an unexpected visitor.
Thomas _____ in inventing many electrical machines
The Changjiang River has been polluted badly and is not good _______.
I think he must have seen me at the meeting last night, ______?