18.
(A) "It is estimated" that
(B)"approximately" 2.65
(C)"billions" of Christmas cards
(D)"are sold" in the United States each year.

答案：登入後查看
統計： A(7), B(47), C(117), D(21), E(0) #327172

詳解 (共 6 筆)

#441931
這題是託福考題，網路有討論。複數的s 加在card後面，前面不用~
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#604156
再查一下網路，正確用法是 2.65 billion Christmas Cards 或者前面無數字的 billions of Christmas Cards
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#822854
不清楚是否可以寫2.65 billion of Chrismas cards?
網路寫的是2.65 billion Chrismas cards。 
of 前面要加s，如 Approximately 600 billion cups of coffee are consumed every year globally.
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#822796
筆記
2.65 billion of Chrismas cards/ billions of cards 
2 million people/ millions of people 
ㅤㅤ
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#604120
你是在說billion不用加s對吧
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#690910
*前有「不定數詞」（several, many, a few...）修飾，或完全沒有數詞（1, 2, 3...），而且後面有介詞of時，單位數詞（million, dozen...）本身通常加s，之後再接複數名詞：

確切數量：數詞+million+複數名詞   ex. 3 million people (o)   3 millions of people (x)
概略數量：millions of + 複數名詞   ex. millions of people/ many millions of people
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