-- I'd like to invite you to a party tomorrow evening.-- Thank you, but ______ I'll be free I'm uncertain.
Let the dog loose so that it_____have a run.
We all got up early_____we might start at six.
They stopped at Tianjing_____they might visit the TV tower.
She has _____she remembers all the names of the students she has taught.
It is_____ all of us can do it.