Having devoted his life to the realization of racial equality，former South African President Nelson Mandela＿＿＿on December S，2013

Bob’s tape recorder is so wonderful. –Mine is at least ___good, if not ___.

She is in a poor _____ of health, which worries her mother much.

______ rapid progress has he made that we all admire him.

I’m amazed to hear from my school teacher again. _______，it is ten years since we met last.