單項(xiàng)選擇（每題1分）
The stones each _____ as much as two tons.
A．weighsB．a(chǎn)re weighedC．weighD．is weighed
C
考查主謂一致。Each放在主語(yǔ)后時(shí)，作的是同位語(yǔ)，謂語(yǔ)用復(fù)數(shù)形式。排除A、D；stones和weigh是主謂關(guān)系，故不被動(dòng)，排除B。故選C。
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