The beautiful song ________ me of those happy old days we had spent together.
It still puzzles today’s scientists ______ some mammals produce their young ______ others lay eggs to produce their offspring( 后代)
-- Mum, I failed again in today’s examination. --Oh, ________. The world is not _______.
______what many people thought, the graduate came here not to ______ fame or money but the true value of life.
Her genuine love for you may _______ what she has sacrificed (牺牲)to make you succeed.
Totally _____ accident, the businessman got hold of a ten-pound fake banknote that was believed to ______ two hundred years ago.