1 I am not sure whether such__all the means that_been tried
A is,has B are,have
2 All that can come__come,all that can be eaten __eaten up
A has,have been B have, has been
3 large quantities of cotton__shipped all over the world already.A large quantity of bamboo__used for
pipes to carry water.
A has been,are B have been,is

1. 选 B
"means"这个词单复数同形，很容易造成误解。在这道题里有个修饰它的“all”（表所有的），所以means应该是复数.that have been tried是means的定语，且means在定语从句中作主语，所以用have.

2. 选 B
第一个“all”指的是人，"that can come"作它的定语，人不止一个，所以是have;第二个“all”指的是“食物”，“that can be eaten”作它的定语，由于食物不可数，所以用“has”.这句话的意思就是：能来的人都来了，能吃的东西也都被吃光了。

3. 选 B
“cotton”跟“bamboo”都是不可数名词，但在前句“large quantities of cotton”的中心词是“quantities”（复数），“of”作介词，表示“由...组成的”，所以这句的主语是复数；第二句的主语是“bamboo”,"a large quantity of"指“大量的”,用来修饰“bamboo”，"bamboo"不可数，所以用“is”.