英语语法题,1 Nobody likes her because she ____to carry favour wit

英语语法题,
1 Nobody likes her because she ____to carry favour with the boss.
A has always tried B does always try C always tries D is always trying
(为什么这里不选C呢?选D）
2 Have dinner with us,____?
A will you B are you C would you D aren't you
(不明白这里为什么不选C选A)
3 It was agood game ,and at the end the ___was Argentina3,Germany 2
A account B mark C score D record
（答案是C,为什么不选D呢?）
4 Mary enjoyed herself ____the full at her birthday party yesterday evening.
A on B in C to D at
(答案是C,还是不懂)
5.A dolphin six ____length can move as fast as many ships.
A feet in B foot in C feet of D foot of
(答案是A,为什么是过去式呢?)
6.When ____ from the windows ,the lake looks very beautiful.
A seeing B being seen C seen D to see
(这里为什么不选A?不是用主动吗?是人看出去啊?)
7 The never ______stimulus.
A replies to B responds to C answers D reflects
(答案是B,不懂)
8.____ problems in sailing in tropical seas is the coral reefs.
A One of the biggest B Of the biggest one
C The biggest one D There are the biggest
答案是为什么是A呢?怎么不选C啊?