— Have you seen______ pen? I left one here this morning.— Is it___________ black one? I think I saw it somewhere.
My mother always has__________ housework to do on weekends.
It’s important ______us to learn English well.
Liu Lei is ________better at Chinese than Liu Ying.
Eating more vegetables ______good for your health.
Lucy ________comes to school on time. She _______ comes late.