1.The plance.... (leave) Buenos Aires at midnight last Night 
2. Helen....... (Bring) her ccousin to the party yesterday? 
3. Children often..... (Love) to play with sand? 
4. I..... (Go) to school late because the clock didn't go off. 
5. In the past, Farmers mainly... ..... .( plough) with a Buffalo
6.  although they have to work hard in the field, they still  ..... . (LIVE) happily
7. He... . (write) that novel in 1989
8. It was warm, so I ..... ( Take) off My coat. 
9. George says he's 80 years old, but Nobody.. .... (Believe) him. 
10. Water ( boil) at 100 degree celsius
11.the film wasn't  very good. I. . .... ( not enjoy) it very much, 
12. I knew Sarah was very busy, so i. ...... ( not disturb) her.