thor of the article believes that it isthe test system, ______ teachers, that is responsible for the heavy burden of themiddle school students nowadays

To keep healthy, most retired old people _____ jogging as a regular form of exercise．

we watched the panda, we stood still,______ to one another.

You should have recited the text yesterday.— ________. But I forgot all when asked to recite in front of many students.

We _____ had told her that she failed the examination.