IV. Put the correct form of the verbs in blankets to complete the sentences
2. So far they (visit) Ha Long Bay three times.

3. That school (build) many years ago.

4. At this time next week, I (have) a summer holiday with my family in Nha Trang.

5. The Browns (do) their housework when you (come) next Sunday.

6. John couldn’t read until he (be) eight years old.

7. You must practice (speak) English when ever you can.