(1/2)All (what) is needed is a cup of water.A.the thing B.that C.wh

问题描述:

(1/2)All (what) is needed is a cup of water.A.the thing B.that C.wh

all the thing作为一个主语,后面不能同时跟2个谓语,因此不选.
因为这里需要一个成份,作all的宾语、又是从句的主语,that和which只能作连词,本身不能做成份.
因此选what,是.的东西的意思.