-Is Mr. Li in his office ?-No, he __________ in the office. He’s ill in hospital.
She __________ be here. I saw her come in.
I was so tired this morning that I couldn’t _______________early as usual.
Beijing, ______________ capital of China, has _________________ long history.
The teaching building has five floors. My classroom is ______________ the third floor.
—Open the window please, Mike. —____________? I didn’t hear what you said.