- Trung's father [1.teach] .................... him how [2. ride] ............................ a bike when he [3. be] .................twelve years old.
- Can I borrow your book? No. I'm reading it. When I [4. finish] ......................... it, I [5. lend] ......................it to you.
- We [6. go] ............................ to Ha Long this weekend.
- You [7. play] .............................. so much when you [8. live] .......................... in the countryside?
- Yesterday Hoang [9. spend] two hours [10. repair] ............................. his computer set.