【正文】
____ (write) a letter. 9. They ____ (have) a Chinese class now. 練一練 一 .用所給動詞的適當形式填空 . ! The cat____________(run)up the tree. twins__________(have)breakfast. ________(clean) the blackboard? No,he isn’t. (play)the piano in the ask him to e here. ! They____________(sing)in the classroom. is running are having Is cleaning is playing are singing 二 .選擇填空 . mother is _____TV. A. looking at C. reading D. watching ____a book? Yes,I am. A. Do, read ,read C. Are ,reading D. Are ,looking _____,the