分类：教育/科学-学习帮助
问题：英语改变句子TheseareEnglishbooks.(改为单数 
These are  books. (改为单数形式）My pencil isn't in the pencil box.(改为复数形式）Beijing is （in China）.  (就打括号部分提问）
回答：These is an English book.  

My pencils aren't in the pencil boxes.

Where is Beijing in ?