Success belongs to those who work hard. I firmly believe that, _____my own efforts, I can make it.

I’m going to Shanghai on business this afternoon, so I have to _______ my things now.

While studying， fix your mind on what is really important， or you will         remembering nothing.

Our study group is ___ three girls and two boys.

We’d be very grateful if you could join us because your cooperation will _____ the timely completion of our project.