1.I am afraid that your request to speak at the ceremony is not quite _______,because we have already had everybody _______ ______.
A.in place; speak; in place B.in place; to speak; in place
C.out of place; speaking; in place D.in place; to speak; in the place
be not quite in place （要求）不合理,不妥当（字面意在,不到位,不上路）
have sb.in place 安排某人就位（到位）,安排妥当.
everybody to speak要发言的每一个人,不定式作后置定语,干扰项,因常见have sb.do sth.结构.
做题技巧：第一空,in place 三个,out of place 一个,确定是in place的（如是out of place,此题一下子就做出了,出题者不会给你这个便宜占的）第二空,to speak 出现两次,speak,speaking各出现一次,speak的可能性较大,因为speak,speaking只有一个,如能确定是其中一个,又马上排除三个了.最后一空in place 三个,in the place一个,同理不是in the place,所以,第一空为in place,第二空为to speak,第三空为in place ,不用英语知识,只用数学方法及心理学方法,就能确定正确答案.
2.The skin is the largest organ of your body ______of three layers; _______are essential to _____your body against diseases,poisons and the sun’s harmful rays or radiations.
A.consisting; they; protecting B.consisting; which; protecting
C.made up of; they; protect D.consisted; they; protecting
答：A
请注意原题中的这个分号,相当于and,如改为逗号,则先B.
第一空分词作定语,consisting,made up of都可以,第二空they,因为分号的缘故,第三空用protecting,因为to是介词.
同样可以用数学方解这种题目.分别是2：1,3：1,3：1
楼主选项没打全,标点没打错,否则选这里的B的会很多!
3.Water is vital _______every living thing ______,without which the world would be a dead place.
A.to keeping; alive B.to keep; living C.to keeping; lively D.to keep; alive
答：A.
sth.is vital/necessary/ essential to (doing) sth.句型中的to是介词,后跟名词（动名词）,这是关键.这一题用数学方行不太通,因为第一空是2：2,一次只能排除2 个.第二空倒可以帮上点忙.alive的可能性大些.在第一空能确定是to keeping时,有点用.