请教三道菜鸟语法题

Verdun

谢谢，这是PP伴侣上的语法题，大家也作这些题吗？许多大侠说的PP是不是指的这个PP伴侣，共有10套语法、听力、阅读

佐儿

第一题的划线原本是在simpler下面？TOEFL常有比较级的考点，simpler可为simple。我看不出steamship有什么问题

lyzzap

第二题应为B，金山词霸上有例为证：
Stephen Hawking's achievements earned him the acclaim of the entire scientific community.

Verdun

谢谢！

fishblue7711

只知道3。
可能应该改为astronomers （天文学家）

Verdun

希望知道原因，或者怎么改，谢谢！

1、The Mississippi riverboat, which evolved from simpler steamship of the early 1800's, became the dominant form of passenger transport on the Mississippi River.
答案选B，不知错在那里？

2、Published in 1957, John Cheever's first novel, The Wapshot Chronicle, earned------the National Book Award.
A. that he had        B.him         C. was his        D. to him
答案选D，为什么不选B，需要加to吗？earn后能加双宾语吗？

3、Stars provided early astronomer with a reference system for measuring the motions of planets, the Moon, and the Sun.
答案选A，是provide 天文学家，还是天文学？