【简答题】翻译下列短语并完成句子。 1. a balanced diet ____ 2. keep the balance of nature ____ 3. keep one' s balance___ 4. lose one's balance ( =be out of balance)___ 5. He ______ and hurt himself when he went upstairs. 6...
【简答题】The policeman's attention was suddenly caught by a small box which ______ placed under the Minister's car. A. has been B. was being C. had been D. would be