我们班有二十五个学生，其中一半是女生。

Wǒmen bān yǒu èrshíwǔ gè xuéshēng, qízhōng yí bàn shì nǚshēng.

There are twenty-five students in our class, and half of them are girls.

我们班里只有几个男生。

Wǒmen bān lǐ zhǐyǒu jǐ gè nánshēng.

Our class only has a few guys.

老师在班上经常问我们问题。

Lǎoshī zài bānshàng jīngcháng wèn wǒmen wèntí.

The teacher often asks us questions during class.