Tom, clean up the broken glass _________ someone walks on it.
It is one of the funniest things _________ on the Internet so far this year.
If there is a lot of work _________.I’m happy to just keep on until it is finished.
To learn English well, we should find opportunities to hear English _________ as much as we can.
If we have illegal immigrants _________ in,many local workers will lose their jobs.
The director had her assistant ________ some hot dogs for the meeting.