单项选择题

They were at work when they received () SOS from ()school, and they immediately started their police cars

A. the, the                
B. a, a 
C. an, a                 
D. the, a

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A. cheer B. chest C. chemist D. cheat
单项选择题
() I like about her is her diligence.

A. That
B. How
C. What
D. Which
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