The passenger called the young man back because ______.
A. he wanted to help the young man
B. he wanted to make friends with the young man
C. he wanted to punish (惩罚) the young man for his had behaviour (举止)
We decided not to climb the mountain because it was raining ______.
A. hardly
B. strongly
C. heavily
Mary likes playing ______ piano while David is interested in listening to ______ music.
A. the; the
B. the; /
C. /; the
______ people went to California to look for gold.
A. Thousand of
B. Thousands of
C. Ten thousands of
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