B.whatC.thatClothingmadeofman-madematerialshascertainadvantagesovermadeofnaturaloneslikecotton,woolorsilk.A.oneB.whatC.thatD.theonesmadeofnaturaloneslikecotton,woolorsilk.做什么成份，用到语法是什么

Question

B.what C.that
Clothing made of man-made materials has certain advantages over _____ made of natural
ones like cotton,wool or silk.
A.one B.what
C.that D.the ones
made of natural
ones like cotton,wool or silk.
做什么成份，用到语法是什么

Answer 1

选C
made of natural ones like cotton,wool or silk.做that,也就是clothing的定语.
that 指代Clothing,为了避免重复,所以用that代替.
全句的意思就是人造材料制成的布比天然材料制成的布好.
这里的that是为了避免重复,代替前述名词clothing.它是一个代词,而不是宾语从句里的连词,所以不存在先行词的问题.
楼上的及时有点错误,介词后面可以接what.比如：I'm interested in what you will do with this dog.
这里如果用what,那么就是要它引导一个宾语从句,那么它后面应该有谓语动词,这里是系动词is