都是我不大明白的,所以给出答案后要详细的分析说明,

都是我不大明白的,所以给出答案后要详细的分析说明,
1.This is______I wanted.
A.the one what B.which C.one which D.the one
2.Many students enjoy the book Harry Potter__________by JK ***.
A.written B.was written C.wrote D.was Writing
3.--Look,a bling man is in the middle of the street.It's too dangerous.
--Let's go and help him___________the road.
A.through B.along C.across D.over
4.Books_________China's successful manned spaceship are very popular.
A.on B.in C.with D.of
打题也好累哦.
那个,第3题蒙也能蒙出来选C,.正确打案也是C.可是across作副词,不是动词啊...晕了
尤其是第二题和四题