―Iwonderifyoucangoshoppingwithmetogether．―Sorry．I      ...

问题详情：

―I wonder if you can go shopping with me together．

―Sorry．I       a letter all the morning and haven’t finished it yet．

A．am writing                                              B．was writing

C．have written                                            D．have been writing

【回答】

知识点：现在完成进行时及其被动式

题型：选择题