单项选择题

What does the underlined word"aggregate" in PARAGRAPH 3 most probably mean？

A. Gigantic.
B. Heavy.
C. Total.
D. Maximum.

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单项选择题

What does the underlined word "them" in PARAGRAPH 5 refer to？

A. Gift cards.
B. Americans.
C. $110 million.
D. CEB TowerGroup projects.

单项选择题

What is the author's attitude towards online self-gifting？

A. Unclear.
B. Neutral.
C. Negative.
D. Supportive.