(2012陕西卷)No matter where he is, he makes _____a rule to go for a walk before breakfast. A. him B this C. that D. it
Believe it or not, crying is a way you can imagine ______ pressure.
__________ the students who have taken part in the sports game is unknown.
_______, the more exercise you do, the richer your knowledge will be.
His mother happened _______ when his program was shown on Channel Young.
By the time he was ten, Edison _________ experiments in chemistry.