—Someone is knocking at the door. Who ______ it be? —It ______ be Tom. He is still in the school.
The boys have played tennis for over hour.
My friend __________ English than me, so she often helps me with my projects.
–Where did you get the book? –From the library. And I have __________ it for two weeks.
The teacher wanted to know __________.
–Hi, Danny! I can’t find my dictionary. Have you seen it __________? –Sorry, I haven’t. Why not ask Kitty? Perhaps she’s seen it.