Our teacher insisted that the keywords worth paying attention _______ before class.

Do you think you can repair this machine withouthelp—— _________. This is not the first time for me to doso.

The poor man had not slept all night and completely___.

I ______ the poor rabbit, but I didn’t have the right drugs with me at that moment. [ ]

Students must be strict _________ theirstudies and teachers should be strict ________ their students.