1 Ba/teach Liz Vietnamese// Yes
Did Ba teach Liz Vietnamese ?
Yes, he did.
2. he/mail his friends a postcard//No
Did he mail his friends a postcard?
No, he didn't.
3.they/ run home/yesterday //No
Did they run home yesterday?
No, they didn't .
4. Mrs.Robinson/buy a poster //Yes
Did Mrs.Robinson buy a poster?
Yes,he did.
5. She/ receive many gifts // No
Did she receive many gifts?
No , she didn't......