单项选择题

Right now the California Air Resources Board requires that a percentage of new cars sold should be flee of emissions. What is that percentage()

A. 1%.
B. 5%.
C. 10%.
D. 100%.

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友谊的定义与意义；2．拉帮结派不是真正的友谊；3．真正的友谊是建立在坚实的基础之上的。
单项选择题
Did the merchant know who had taken the umbrella()

A. Sure.
B. Not very sure.
C. Not at all.
D. Probably.
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