You can give classroom tests once every few weeks — sometimes even once a week.

每隔几周，就要有一次当堂测试———有时甚至每周一次。

youdao

You can give classroom tests once every few weeks -- sometimes even once a week.

每隔几周，就要有一次当堂测试———有时甚至每周一次。

youdao

You can give classroom tests once every few weeks -- sometimes even once a week.

每隔几周，就要有一次当堂测试———有时甚至每周一次。

youdao