After many failures the most difficult ______ is how to keep our strength up and fight again.
—Car 18 won the race. —Yes. But its driver came close to ______.
. ___ to nuclear radiation, even for a short time may produce variants(变异体)of genes in human bodies.
Michael never dreamt of ____ for him to be sent abroad very soon.
Once your business becomes international, ___ constantly will be part of your life.
I can hardly imagine such a little boy ___ across the Nile.