赞题库-背景图
单项选择题

A．that
B．when
C．who
D．which
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单项选择题Mark Twain believed that he could ______.

A．make the old man laugh
B．make the young man laugh
C．make the old man cry
D．make the young man cry

单项选择题A．problemB．personC．questionD．thing

A．problem
B．person
C．question
D．thing