请教几道语法题

zulo_zl

To reach (a target) of (spending) a billion dollars (in a ) lifetime, a human being would have to spend money (at rate) of more than 50,000 dollars per day.

为何选d 少了a吗？

（As the) US border (pushed) further west, the MId-west territories (developd) economically and industrially and big cities (such) as Chicago,St.Louis and Cincinnati-appeared.

B错了是因为应该用被动吗？

The number (of) seats in the Senate (has) always equal to twce the number of states,(thus) there are two senators (for) every state.

has应该改问have 吗？ 不是应该用单数吗

（When) we consume the earth's resources, we need to realize that (there is) a level of consumption (which) sustainability can (be achieved).

c为什么不对呢

Darwin (stated that) individuals with characteristics (best adapted) to existing (condition) survive and make up an (increasing) larger proportion of their species.

C为什么不对

Black Boy in an autobiographical account of the childhood of Richard Wright and portrays the stuffing of an African American ____ bigotry.

A) in a society full of

B) society in full of

C) who in a society full of

D) in society full

我选B 为什么是A呢

Entropy is the (degradation) of energy from order to disorder, and (describes) the tendency of (anything to degeneration)

D该怎么改呢

The human eye retains an image for (a) fraction of a second longer than the image (is) present, so a (motion) picture gives a rapid succession (after) still picture to still picture.

after应改为什么呢

The North Star was once called Cynosure by many of ( Greek), a word (that has) found (its) way into our dictionary, meaning the (centre of) attraction or interest.

Greek应加s吗

Bacteria were first observed by the Dutch naturalist Antoni van Leeuwenhoek in 1683, with the (aid) of (simple) microscope (of his) own (construction)

simple为什么不对

In northen Australia, saltwater crocodiles that (reported) grow up to 8 m in length, (lurk in) creeks and pools and (have been) known to attack (humans).

是觉得reported好像不对 grow up才是谓语吧 那应该怎么改呢

In order for (fertilization) to take place and seeds to form, pollen (must be transferred) from the flower of one plant (to that) of another plant of (same species)

D该改为什么呢

First published in 1962, Rachel Carson's book Silent Spring ___a prophetic warning of the dangers of environmental pollution.

A) proves to be        B) proven has been       C) being proven that       D) has proven to be

为什么是B呢

The platypus' senstive snout (has been shown) by researchers to contain electroreceptors, which enable (it) to detect the electrical field produced (by) the moving muscles (for) its prey

for该改为什么呢

(The life cycle) of lungworms can be directed (and) involve intermediate (host), such (as) snails and slugs.

host是可数的吗

望解答 谢谢~~~