5400×（1-79），
=5400×29，
=1200（个）；
答：还剩1200个字没录入．
一篇文章，每行有21个字，按这样排共有72行，这篇文章约有______个字．
—Jim, could you tell me if you _____________ our party tomorrow?
—I think I will if I _____________ free.
A．will take part in, will be
B．take part in, am
C．will take part in, am
D．would take part in, will be
