In North America, the Nebraska culture that succeeded the Woodland culture about A.D 1300 pioneered in _______ to become the area's chief economic activity, agriculture.(A) it was(B) which was(C) what was(D) was为什么选C，谁能帮忙分析一下？多谢！
...平行结构对称的问题。误：Henry walked swiftly, neither looking to right nor left.语法书上的改法是这样的：正：Henry walked swiftly, looking neither to right nor to left.1. 如果改为：Henry walked swiftly, neither looking to right nor looking to left. 的话语法上有问...
The back of his hand was at right angles to his body, his thumb parallel to his thigh.请问老师，his thumb parallel to his thigh是独立主格结构吗？名词his thumb + 形容词parallel，表示伴随相当于并列句 The back of his hand was at right angles to his
body, and his thumb was ...
以下句子中的to and from属于两个介词用and并列，后面只带了一个宾语：
Local buses run regularly to and from the nearest town. 当地有往返最近城镇的班车。
I rely on the train to take me to and from work each day. 我每天靠火车上下班。
E...
if the district is essentially giving a pass to students who do not do their homework because of complicated family lives, it is going riskily close to the implication that standards need to be lowered for poor children.这个句子“it is going riskily close to the implication that...”中，clos...
It is a real pleasure to be here to open the third meeting of our forum and to be welcoming such a distinguished and influential group of people fromboth our countries,many of whom are now old friends.老师，这里的to be welcoming 改成 to welcome 可以吗？