用括号内所给动词的适当形式填空。
---Where is Jim?    --- He           (go) to Shanghai.
Jimmy          (read) a science book when I came into his room.
It is twenty years since the bridge           (build).
The goal of the game is          (test) your knowledge of English grammar.
If you double-click on the icon, the web page          (appear) on the screen.
Spring is the best time for            (visit) Chinese gardens.
I often hear her           (sing) in her beautiful voice.
Look! How beautiful our city           (look)!