We _______ two hours in doing our homework every night.

 He used to ____late, but now he is getting used to _______early.

— I rang the bell for a long time last night, but no one opened the door.— Oh, the family __________ a party and they didn’t hear the bell.

 —Who’s the man over there? Is it Mr. Black? —It ______ be him. He’s much taller.

It is helpful to               a good habit of reading in language learning.