作业帮一道英语选择题.知道的讲下,谢谢
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一道英语选择题.知道的讲下,谢谢
The present population of this city is three times（ ）it was ten years ago.
A. what B. since
C. that D. as
答案是A为什么不是C?
The present population of this city is three times（ ）it was ten years ago.
A. what B. since
C. that D. as
答案是A为什么不是C?
1.此题考查倍数表达句型.
倍数表达法：倍数词(three times) + 名词
如：I have three times your income.我的收入是你的三倍.
2.后面是一个名词性从句.
如果用that引导,表明该从句不缺少任何成分.
但是it was ten years ago中明显缺少一个表语(was的后面),而只有疑问代词what可以有此功能.
倍数表达法：倍数词(three times) + 名词
如：I have three times your income.我的收入是你的三倍.
2.后面是一个名词性从句.
如果用that引导,表明该从句不缺少任何成分.
但是it was ten years ago中明显缺少一个表语(was的后面),而只有疑问代词what可以有此功能.