What were you doing ________ last Sunday morning? 

Eating healthy food can help us       .

--- Linda, pass my glasses to me, please. I can _____read the words in the newspaper.---OK.

---Seems no one knows _____ what happened to Malaysia Airline Flight 370.---It’s really sad, hope more and more resources will be offered in the search.

Please _____ the water when you brush your teeth.