1. He______ (go) to America the year before last.
2. — What             you ______ (do)?
    — I            (be) a teacher.
3. Do you like ______ (drink) milk?
4. He ______ ______ (not have) his supper yet.
5. We ______ (see) Uncle Li tomorrow.
6. Joan's mother often ______ at four, now she ______ (cook).
7. He             (read) a book when the accident ______ (happen).
8. ______ (travel) by air is very fast.
9. Let us ______ (wait) outside.
10. The teacher told us ______ (not talk) any more.