I felt very tired when I got home，and I ________ straight to bed(2013·重庆，21)

While Helen _____ along the river after supper, she ____ a wallet lying on the roadside.

If you ________ smoke in the room, please keep the windows open.

The teacher _____ the students how to improve their writing skill since last term

, I’d like some more chocolate.– Sorry, there is ____ left.