A child who lives in a boring environment will develop his intelligence less than one who lives in rich and varied________.
When such an organised group became too large for its members to travel together comfortably, it would ______.
By the time Jack returned home from England, his son _____from college.
Those successful deaf dancers think that dancing is an activity _____ sight matters more than hearing.
______ many times,he finally understood it.
I was still sleeping when the fire _______, and then it spread quickly.