【正文】
ot ( )6. My books ________ on the floor this morning. They ____ on the desk now. A. are are B. were are C. are were 四. 用 be動(dòng)詞的正確形式填空。 1. There __________ a big lake here before. 2. There ____________ some tall buildings now. 3. I _____________ listening to music now. 4. They ___________ not at school yesterday. 5. There ___________ some m