The telescope was designed to distinguish between random signals and_______ which might be in code.
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One is never too old to learn; _______ are never too old to learn.
Both men realized what was happening; _______ could do anything about it.
The drive gave him a few biscuits; _______ was given a few biscuits.
_______ of the students in my class could solve the problem yesterday.
My father said_______ would invite our teacher to dinner on Saturday.
You said you were going to introduce a friend of_______ who wanted to buy a new house.
