1.When did you go to work? As soon as they came,we___to work.
A.went B.were going C.had gone D.go
2.The center of gravity of the human body_____behind his joint.
A.located B.locating C.to locate D.is located
3.____his expression,he is greatly moved.
A.To judge from B.Judged for C.Judging from D.Judged with
4.____I admit that there are still some problems about the traffic in this area,I don't mean that it can't be solved.
A.While B.Until C.Unless D.As
5.Watching the sun rise above the branches of trees whose roots stretch deep into the heart of the Wall,you fell you are standing on a man-made structure that has indeed become part of____.
A.the nature B.nature C.a nature D.natures
请解释为什么 谢谢
答案是ADCAB，请高人解释下为什么
