_____ it is very late now, the researchers are still working in the lab.
\_\_\_\__ it is very late now, the researchers are still working in the lab.
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The word “tip” in Paragraph 1 probably means _____.
The word “tip” in Paragraph 1 probably means \_\_\_\__.
Three days later, word came _____ our country had sent up another man-made satellite.
Three days later, word came \_\_\_\__ our country had sent up another man-made satellite.