一.用下列的词或短语的适当形式填空.

一.用下列的词或短语的适当形式填空.
memorize,laugh at,make up,be afraid to,complete
1.I'm shy.I ________ speak in public now.
2.It's not polite ________ blind people.
3.I have difficulties in ________ so many new words.
4.Our homework is ________ new sentences with the given new words.
5.Children usually can not speak ________ sentences before one year old.