Decide which suffix (-ful or -less) should be added to the b

Decide which suffix (-ful or -less) should be added to the base word to make a new word that fits the sentence.
1) Water is an alomst tast___ liquid.
2) A quiet park is a rest___ place.
3) A dictionary an be use___ to any student.
4) I was speech___ with surprise.
5) I was scared by the fright___ sigh.