---Look! The telephone is broken. Someone damaged it ________ purpose. ---That may be right. But perhaps it was broken _________ accident.
Mr. Li gave all the textbooks to all the pupils, except _______ who had already taken them.
_______ matters most in learning English is enough practice.
--What did you get ______ your mother ______ Mother’s Day? -- A beautiful card ______ “Thank you, Mum”.
--Who______ it be that is knocking at the door? --It ______ be Father, but I’m not sure.
Judging from his______ expression, this problem must be quite ______.