In order to ____ the debt, the couple has worked hard for years with little food and only a small room to live in and never a moment's rest.

In the time of HINI, scientists ____ their spare time to conduct research on the ways of curing the disease.

The moment I saw her, I ______ her, although she changed a lot through years. 

—Will you be able to finish the report before Friday? —I can’t ________ anything, but I’ll try my best. 

Traditionally，college students hold a graduation ceremony to encourage themselves before they________on their life journey.