.Play, often seen as ______ activity for kids, is still important in ____development of teenagers.
_____ was very ______ that little Jim wrote the letter.
What is it _____ his daughter needs most?
Who was it _____ saved the drowning girl?
“How was ______ they discovered the entrance to the underground palace?” “Totally by chance.”
____ that caused him to serve dinner an hour later than usual.