No matter where he is,he makes ________ a rule to go for a walk before breakfast.(2012·陕西)
The sunlight is white and blinding, ________ hardedged shadows on the ground.
________ with care, one tin will last for six weeks.
Every day ________ a proverb aloud several times until you have it memorized.
All flights ________ owing to the heavy fog, many passengers could do nothing but take trains.
The poem A Red, Red Rose written by Robert Burns is popular with the Chinese young people, because the poem is easy ________.