连词组句。

1. it's, in, December, cold

    _____________________.

2. weather, the, is, hot, in, July

    ______________________.

3. October, is, my birthday, 1

    _______________________.

4. New Year's Day, January, 1, is

   ________________________.

迭板钩比起锻造吊钩有优点，其一是制造比较简单，特别是（）较大的吊钩。