If you're not sure what these are, it will help if you do a practice test and give it to a teacher to mark.

如果你对这些东西不是很确定的话，你可以作一些练习测试，然后交给老师评分，这也是很有帮助的。

youdao

If you're not sure what these are, it will help if you do a practice test and give it to a teacher to mark.

如果你对这些东西不是很确定的话，你可以作一些练习测试，然后交给老师评分，这也是很有帮助的。

youdao