It is estimated that the number of foreigners coming to China to learn the language over the last few years ________ maintained an average annual growth rate of 35 percent．
- A.
has
- B.
have
- C.
is
- D.
are
A
這句句子的意思是“據(jù)估計(jì)，在過(guò)去的幾年中，來(lái)中國(guó)學(xué)習(xí)語(yǔ)言的外國(guó)人以每年35％的年增長(zhǎng)率遞增�！边@里有時(shí)間狀語(yǔ)over the last few years，句子要用現(xiàn)在完成時(shí)，所以選項(xiàng)C和D均不對(duì)。而a number of加上可數(shù)名詞復(fù)數(shù)，我們謂語(yǔ)動(dòng)詞用復(fù)數(shù)，the number of加上可數(shù)名詞復(fù)數(shù)，謂語(yǔ)動(dòng)詞用單數(shù)，所以這里用has．
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