Bài 1: Put the verbs in the brackets into the correct form.
1. If you go to Paris, where you (stay) ___________________?
2. If you ( swim )_______________ in this lake, you’ll shiver from cold.
3. If someone offered to buy you one of those rings, which you (choose)___________________.
4. The flight may be cancelled if the fog ( get ) _________________ thick.
5. If the milkman ( come ) _____________________, tell him to leave two pints.