Just as I was about to head out, it suddenly started to rain heavily.

He serves as the principal of the school and is usually very busy with work.

To protect their eyesight, the teacher reminded the students to sit up straight while writing.

He adjusted his tie and stepped onto the podium with a smile.

In math class, we learned how to distinguish between positive and negative numbers.

The red of this sweater is a very true shade; it makes your skin look very fair when you wear it.

On the obverse and reverse sides of the coin, different characters and designs are struck.

On the first day of the first lunar month, every household sets off firecrackers to celebrate.