1.We were so tired because we (had) eight classes
2.Tom (slept)last yesterday.
3.She(won)a prize in the yesterday's competion.
4.Peter(hung) out with his friends yesterday.
5.Every day mr smith goes to work by subway,but he(drived)there yesterday.
6.He (studied) at that school ten yaers ago.
7.May Ihave some of your (photos),please?
8.Look!It's (raining) outside.
9.We don't knlw when he (comes)back.
10.There are lots of (visitors) in Eyrope every year.
11.I(really) like this piece of music.
12.You must help your mother do some(cooking) tonight