单项选择题

He mast have had an accident, or he ______ now.

A．would have been here
B．had to be here
C．should be here
D．would be here
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单项选择题
His visit to the theater was ______ because a lady sitting right in front of him was wearing a huge hat which blocked his view of the stage.
A．impaired
B．spoiled
C．distracted
D．offended
单项选择题
Only ten to twenty percent of cold viruses are transmitted by carriers, who, sneezing and coughing, （） the viruses into the air.

A、spray
B、sprinkle
C、spread
D、sprout
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