With a lot of difficult problems _________ , the newly-elected president is having a hard time.
We can get fresh water from rain, from rivers, or from ________ the ground.
They develop their skills _________ they can do things better and better.
He was late this morning, because the bus was too ________ for him to get on.
_________ is celebrated on September 10’.
-Are you coming to my birthday party? -__________