［B］ new seeds generated
［C］ by generating new seeds
［D］ new seeds generated there
另外，我们还要注意，两个分句之间的代词与名词、助动词与实义动词之间的代替，如：I rely on the system to fix itself, which it usually does with no help from me beyond crossing my fingers. 我以靠系统来修复系统本身，除了用几下手指之外，不需要我的其它帮助，系统经常这样修复自己。
3. 对等连词所连接的各成分应在词性和形式上的呼应
26) The purpose of the research had a more important meaning for them than .
［A］ ours
［B］ with us
［C］ for ours it had
［D］ it did for us
27) Methods of flood control focus on preventing rivers from rising and .
［A］ keep them within their banks
［B］ to keep them within their banks
［C］ keeping them within their banks
［D］ being kept them within their banks
28) Both dogs and cats have ［A］ a keen ［B］ sense ［C］ of smell, sight, and tasting ［D］ .
4. 排列位置的平行，对等连词前后成分的位置应呼应
29) A widespread species, roundworms even thrive on the peaks of mountains and .
［A］ at the bottoms of the oceans
［B］ there are the bottoms of the oceans
［C］ the bottoms of the oceans do
［D］ which the bottoms of the oceans
30) My cousin composes not only ［A］ the music, but ［B］ also sings the songs for ［C］ major ［D］ Broadway musicals.
四、关于几对容易混淆词组的用法
1. “a number of ＋复数名词”作主语谓语动词用复数形式
“the number of＋复数名词”作主语谓语动词须用单数形式
31 The number of time A an object is magnified by ［B］ a telescope can be determined ［C］ by someone who knows ［D］ the focal length of the objective lens and of the eyepiece.
2. “an average(total) of ＋复数名词”作主语谓语动词用复数形式
“the average(total) of＋复数名词”作主语谓语动词须用单数形式
3. “a lot(mass, heap等) of ＋复数名词”作主语谓语动词用复数形式
“a lot(mass, heap等) of＋不可数名词”作主语谓语动词须用单数形式
4. “these(those) kinds of ＋名词”作主语谓语动词用复数形式
“this(that)kind(sort) of＋名词”作主语谓语动词须用单数形式