英语达人进来帮忙解题咯!(要有解释详细者优选)
1.___withthesizeofthewholeearth,thehighestmountaindoesnotseemhighatall.
A.Whencompareed
B.Whilecomparing
C.Compare
D.Comaring
2.Whathesays___.
A.issoundedtrue
B.issoundingtobetrue
C.soundstobetrue
D.soundstrue
3.Atthemomentthemachine___atfullspeed.
A.ran
B.wasrunning
C.hadbeenrunning
D.hadrun
第三体我总觉得错了,B项是不是应该为isrunning.
请把你的做题思路给讲解一下谢谢咯!