我要问几个英语问题The earth turns itself from the west to the east 帮忙

我要问几个英语问题
The earth turns itself from the west to the east 帮忙找一下这里改错我改不出来
If I____this time,I'll try it_____second time
(A)fail,a (B)fail,the (C)will fail,a (D)shall fail,the
___a friend of mine came to see me.
A rainy day B In a rainy day C On one rainy day D One rainy day
Biology is _____.
A scinece of life B science of the life C the science of the life D the science of life
she always looks the best in ____ of the colour
A dress B a dress C the dress D dresses
we pay ____rent by _____month.
A the,the B 无,the C 无,无 D the ,a
不要就给个答案我自己也有答案就是 west to east A,D,D,B,A 只不过不知道则么做,要把为什么这么做告诉我!