7.中文：天气不错。

　　(误)It's a nice weather.

　　(正)It is nice weather.(weather是不可数名词，前面不加a.)

8.中文：下星期再见。

　　(误)See you again the next week.

　　(正)See you again next week.(next week表示将来;the next week表示过去。)

9.中文：历史是很有趣的学科。

　　(误)The history is a very interesting subject.

　　(正)History is a very interesting subject.(学科前一般不加冠词。)

10.中文：他乘火车来这里。

　　(误)He came here by a train.

　　(正)He came here by train.(by后接交通工具，中间不加冠词。)

11.中文：今晚你可以看到满月。

　　(误)You may see the full moon tonight.

　　(正)You may see a full moon tonight.(月亮，太阳等独一无二的物体，当有形容词修饰时可加a.)

12.中文：她刚才去了保罗街。

　　(误)She went to the Paul Street just now.

　　(正)She went to Paul Street just now.(街道名称前一般不加the.)

13.中文：连孩子都会做它。

　　(误)Even child can do it.

　　(正)Even a child can do it.(不定冠词+单数名词表示某类人或物。)