帮我看看这几道英语题选什么啊

题目

帮我看看这几道英语题选什么啊
28.Electrical energy ______ from the sun in a round about way is the most widely used energy today.
A) come B) to come C) coming D) having come
24.______ that he refused to help us,there is no reason why we should now help them.
A) Being seen B) See C) Seen D) Seeing
22.A good many proposals were raised by the students,______ had been expected.
A) that B) what C) as D) so
19.The traffic was very heavy; otherwise I ______ here 30 minutes sooner.
A) should have been C) would have been
B) would be D) had been
20.Over ten people died and twenty people were ______ wounded in the train crash.
A) eventually B) urgently C) bitterly D) seriously
帮我看看选什么答案啊,再给我仔细讲讲为什么选这个答案吧,

答案

C
D
C
A
D
感觉应该差不多,理由就算了啊,其实题目很普通的额.