根据句子意思，用括号中所给单词的适当形式填空。

小题1:The time is too short. It’s        (possible) for Daniel to finish this work.

小题2:Mother’s Day is coming. He’ll use what he has        (buy ) his mother a new dress.

小题3:Take care, children. Don’t hurt        (you) when you play football.

小题4:I’m surprised that Gavin is 50. I thought he was        (young), for he seems to be in his thirties.

小题5:Are you satisfied with these        (sing) performances in the opera?

汽车行驶稳定性