用括号内所给单词的适当形式填空
【小题1】It’s too hard for me to learn it. Can you show me how _______(throw) the ball?
【小题2】We don’t want to _____(competition) with such an experienced team.
【小题3】The more _______(active) you take part in, the more out-going you will be.
【小题4】Some people like ________(train) parrots to talk.
【小题5】It’s _______(usual) for a four-year-old boy to write poems so well.
【小题6】_______(sudden) Alice fell into a hole in the ground yesterday.