2012年语法训练题解。
1. When _________ to dough and heated, carbon dioxide is released, causing the dough to rise.
A. is added baking powder
B. added baking powder is
C. is baking powder added
D. baking powder is added
答案:D
分析:When为状语从句引导词;语序应该为正常语序,A,C错;B语序混乱,明显应该用被动形式,而且有固定结构add to.
参考译文:当把烘烤用粉加到面团里加热的时候,会释放出二氧化碳,使得面团涨开。
2. _________ the percentage of individuals with similar traits in succeeding generations, geneticists use the theory of probability.
A. The calculation of
B. To calculate
C. Is calculating
D. Calculated
答案:B
分析:to calculate,这里用不定式表示“目的”,前半句的逻辑主语是geneticists,只有B符合要求;A中只有主语,句子不完整。
参考译文:遗传学家运用概率的理论来计算在后代中拥有相似特点个体占有的百分比。
补充: 如同A的形式, 逗号前面就是一个名词短语, 然而正确的句子里, 名词短语要么作为主语的同位语, 要么本身是主语, 如11题。 否则就是脱离句子成分, 成为错误。