They _____ have arrived at lunch time but the flight was delayed.

--- ____I take the newspaper to the classroom? ---No, you mustn’t. You ______ read it only here.

 — When and where               we meet? — Let's make it 3:00 at my home.

—Why didn’t you come to Simon’s party last night?—I wanted to, but my mom simply _____ not let me out so late at night.

—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?     —_______ my students have a try?