It may be necessary to stop（）(每隔一定時間) in the learning process and go back to the difficult points in the lessons.

But for his help, I （）(我不可能這么早完成).

Buying clothes（）(是一件很耗時的工作), because those clothes that a person likes are rarely the ones that fit him or her.

I（）(將在做實驗) from three to five this afternoon.

She never dreams of （）(被派到國外).

Over a third of the population was estimated（）(無法獲得) to the health service.

Everybody knows he（）（受到了冤枉指控）.

Some women （）(本來能夠掙一份很好的工資) in a job instead of staying home, but they decided not to work for the sale of the family.

His remarks left me （）(想知道他的真實目的).

If this can’t be settled reasonably, it may be necessary to（）(訴助武力).