改变句子。20′
（1）We have some oranges.（单数）
                                      
（2）These are rubbers.
                                      
（3）John has a big lemon.
                                      
（4）I have a glass.（复数）
                                      
（5）Those are green ballpens.（单数）
                                      
（6）Mary has a nice book.（一般疑问句，否定回答）
                                      
（7）Is this a plane? Yes, it is.（复数）
                                      
（8）They are teachers.（单数）
                                      
（9）These are jeeps. They’re green.（合成一句）