When and where _______ you _________ the bag —- Oh, yesterday in my desk.

If a person has not had enough sleep, his actions will give him ___ during the day.[ ]

dn’t you tell me about your trouble last week If you ___ me, I could have helped.

It is generally believed that constant reading andcomprehending can ______ our mental ability of comprehension while physicalexercise can help build up our body.

The natural resources,such as mine,forest,and hydropower (水电) in that area have been ________. [ ]