第1个回答 2012-08-27
If you don't buy this book,the teacher will be angry.
第2个回答 2012-08-27
If you don't buy the book, the teacher will be angry.
第3个回答 2012-08-27
If you don't buy this book,the teacher will be angry.这是虚拟语气的句型,以后会常用这类句型的!!
第4个回答 2012-08-27
The teacher will get angry if you don't buy this book.
The teacher will be angry if you don't buy this book.
You will make the teacher get angry if you don't buy this book.
If you don't buy this book, the teacher will be upset.