از بین مکالمات زیر؛ کدام گزینه از نظر دستوری دارای پاسخ مناسب نمیباشد؟
1 )
A: What's her grandfather doing? B: He's listening to the news.
2 )
A: What happened to him? B: He had some bruises on his back.
A: Did they buy a new car? B: No, They buy a new bicycle.
4 )
A: Why were you nervous at the airport? B: Because I was late.