Did your father come back early last night?—Yes. It was not yet eight o’clock _______ he arrived home.

It is reported that the government has ____the outbreak of violence by sending a large group of soldiers to police thearea

Mr. Wu, I can’t understand everything in class. —Don’t worry! I’ll _______ the main points at the end.

Please ask the teacher _______ it

I don’t believe this advertisement. That kind of mobile phone is it says.