单项选择题

According to the woman, what causes most of the damage to the air

A．Industrial sources.
B．Automobiles.
C．Nitrogen sources.
D．Natural activities.
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单项选择题
What did his father do when the speaker missed cutting some weeds
A．His father scolded him severely.
B．His father took back the six dollars.
C．His father made him do the cutting again.
D．His father cut the weeds himself.
单项选择题
The speaker felt ________when his father asked him to help cut grass.
A．anxious and worried
B．proud and excited
C．nervous and confused
D．inspired and confident
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