1、from……to……表达了先后顺序，then to多余，B错！
2、move可以及物也可以不及物，I move the desk to a corner.
当表示移动自己时，不用说move oneself，我搬去了非洲，I move to Africa.不能说I move myself to Africa.
1、regard A as B或regard A as adj，as相当于be
regard manner as efficient
2、the early hominids' manner is less efficient than that of modern human beings
B中，it 是同物指代，自己不能跟自己比，错！
1、present as little risk as one chance in a million 和present a risk as little as one chance in a million都是正确的表达方式
2、a risk of sth/doing……的风险，a risk to sb/sth对……是个风险，a risk that……，风险的内容是……，没有a risk for doing和a risk to do
E，it只能指代单数名词risk，present a risk for the risk to cause cancer，错！
A because of B 表示B led to A, 可以理解为先发生了b，之后发生了a，这两件事是独立的，是不同的事情
可以说：more littering has occurred because of the lax enforcement of laws against littering.
不能说： more littering has occurred because people have been throwing bottles along the side of the road。人们在路边扔瓶子和垃圾越来越多是一件事情。
D，
这里有越来越多的轨道附近的垃圾和这些国际废弃物，比如……也是一件事情，不能用because of修饰
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1、整个句子的时间是in 1997，过去的时间，不能用现在完成时
2、the number jumped to 20%, jump to有跳起来以够到的意思，比jump at好