[求助]麻烦各位还有几道语法

（04-10）28. Paleoanthropologists examine fossil remains of extinct primates, while physical anthropologists (concern) with ethnology study the behavior of primates in their natural settings.
是改成concerned还是concerning?

2.形容词后面不能加介词，有这种说法吗？

3.also和and有什么区别？

4.all和of all有区别吗？

5.（04-10）38. Animals have to cope with and control physical and chemical processes that do not
necessarily act （to benefit） of the animal.
是改为to the benefit 吗？有的笔记上说不加to,不知道这种说法对不对？

1,->concerned,谓语是study

concern sb with sth- -->sb is concerned with sth

vt.

2,be capable of doing sth

be worried about sth

be celebrated for

be subjected to

.........

3,also(adv)  and (conj)可以连句子

4，all,数词，副词，代词，名词

all of=among 代词

5，-》for the benefit

thank you