1.b(ehind) at the back of
2.r(acer) a person who runs in a race
3.d(ifferent) not the same
4.d(ifficult) not easy
5.s(hout) say in a loud voice
6.e(verytime) at any time
7.e(xcuse) what you say or write to explain why you are done something wrong
8.a(gree) say "yes" when someone has asked you to do something
9.u(sually) always
10.f(oreign) from another country