cho dạng đúng của động từ
6. If you (arrive) ten minutes aerlier, you would have got a seat.
7, If he worked more slowly , he (not make) so many mistakes.
8, I should't drink that wine if I (be) you.
9, If I ( find) a cheap room, i will stay a fortnght.
10, A lot of people ( be) out of work if the factory closed down.