Scientists sent ............ expedition to ............ Mars during .......... 1990s. 

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• You can see .................. moon in .................. sky at .................. nigh. 

• The government raises money to operate  by tax cigarettes, liquor, gasoline, tires, and telephone calls.

• There are some wild roses whose flowers smell sweetly.

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• There always is one wise woman who is both feared and respected by her people

• The bell signaling the end of the first period rang loud, interrupting the professor’s closing comments

• The patient who was not supposed to be released until the end of the week was told to dress in clothes and report to the nurses’ station.

• Because of its vast tracts of virtually uninhabited northern forest, Canada has one of the lowest population density in the world

• If you ____ Mary by chance, please give her my phone number. 

• When he took the ticket out of from his pocket, a hundred dollar bill fell to the floor without his noticing

• Choose the correct answer to complete the sentence. "We need to cut down on the ________ of carbon dioxide into the atmosphere."

• Some bacteria are extremely harmful, but anothers are regularly used in producing cheeses, crackers, and many other foods.

• It was after shortly microscopes were introduced at the beginning of the seventeenth century that micro organisms were actually sighted.

• Many people who live near nuclear plants are concerned. _________ go wrong, the impact on the surrounding area can be disastrous. 

• It’s a lovely old house, I agree, but can we afford to moderning it?

• The author has not rarely written anything that was not a best-seller.

• The weightlifter who allegedly took performance-enhancing drugs have been named today.

• Choose the correct answer to complete the sentence. "Global warming has ______ impact on water supplies."

• Choose the correct answer to complete the sentence. "Some scientists were _____ of having falsified the effects of climate change"

• Choose the correct answer to complete the sentence. "Nowadays the common method for drying vegetables and minced meat is putting them in chambers and blowing hot air through."

• Research has proved that a baby can distinguish its mother’s voice the moment he is born.