选词填空。
1. Yesterday they _______ (have, had) lunch _______ (at, on) 12:30_______ (of, in) their school.
2. She_______ (will, does) have to stay_______ (in, at) home and _______ (look, like) after her grandma, because she is ill.
3. We_______ (see, saw) a lot of new _______ (houses, house) _______ (on, in) our way_______ (to, from) Shunyi.