It never occurred to humans until the mid-1990s ______ some animals can be cloned.
_____ by the latest electronic toys, the little boy stood in front of the windows, without moving.
Every day ____ a proverb aloud several times until you have it memorized.
A good listener takes part in the conversation,offering ideas and ___ questions to keep the talk flowing.
____under the tree was a charming girl aged about seventeen or eighteen.
—Will you attend the meeting this afternoon? —But I ________ told anything about it.