He fell asleep immediately last night; he must ________ (be) very tired.

Heaskedmewhethermybrother________(fly)toBeijing.

The floor does not look so bad when ________ (sweep) clean. 

This diploma ( 毕业文凭 ) ________ that you have completed high school.

Agreatnumberofsmallpowerstations________(setup)intheircounty sinceliberation.