题目内容
The rich man gave ________ dollars to medical research.
[ ]
A. million of
B. three millions
C. two millions of
D. millions of
答案:D
提示:
提示:
|
当表示不具体的数目时用 hundreds / thousands/ millions/+of ,当有具体的数字或several,那么hundred / thousand / million 后面不加s不要 of . |
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