The author believes that it is the test system,________ the teachers, that is to blame for the heavy burden of middle school students.
Not until quite recently ___ that language is closely related to culture.
Only if ___ the examinations, ___ get the gift promised by your father.
The plan ___, what is most important is to carry it out.
He tends to ___ his shoes before he goes out to work every day.
His pronunciation is not ___ but he can manage to make.