1.the earth ____(go) around the sun.2.Look!the little cat _____(eat) the beef
问题描述：
1.the earth ____(go) around the sun.2.Look!the little cat _____(eat) the beef
3.peer _______(ski) and skated yesterday
4.my mother ________(cook) at 6:00 pm yesterda
5.which is _________ _________(difficult),this one or the one?
答
1.goes
2.is eating
3.skied
4.was cooking
5.more difficult