fill in the gaps with can can't could couldn't or was/wasn't able to.
After saving their money for ten years, they _____buy a house.
Sam and Beth ____speak Italian fluently, can't they?
3.____you tie your shoelaces when you were four years old?
4.It was a very tricky question, but Paul__answer it.
5.I_____hear what they were saying because the music was too loud.
6.Although it was difficult, the children____build a tree house .
- Susan ____come to the phone. She is busy/