It’s getting late. We must "be off" now. Which of the following can’t replace the underlined part?
Ladies and gentlemen, due to an unexpected accident, one of the singers who all of you to hear____tonight,
The course normally attracts 20 students per year, ____up to half will be from overseas.
As a grassroots singer, she reads everything she can get hold of and catch every opportunity she meets up with so as to gain____progress.
This nationwide smog should serve as a reminder to all, indicating a high time that we____ on what we've done to the environment.
more effectively with others, more and more people equip themselves with a higher education.