He was very busy yesterday; otherwise he ______ to the meeting.
A．would have come
You can't hear what I'm saying ______ you stop talking.
Sorry I can't answer your question. I know ______ about the subject.
I ______ get this done immediately or it will be too late.
He ______ working till he was seventy years old.
You ought to take every ______ of improving your English.
______ from space, our earth, with water covering 70% of its surface, appears as a "blue planet ".
C．To be seen
The novel ended happily, and the young couple were married ______.
A．in the final
B．in the end
C．to the last
The building ______ mostly undamaged after the earthquake, and only minor repairs were necessary.
He is an honest official and never ______ any gifts from people who sought his help.