语法问题

未知数325208

1,Comparatively few cities in the United States have competing newspapers today, a major change from 1900 _____ more than two newspapers.

A because then most large cities having     B  when didi most large cities have     C  then most large cities that had    D when most large cities had

为什么选D，我觉得A也对阿

2，  A stream of volcanic lava flows differently , ______ on the sort of ground it flows over.

A     to depend   B   depending   Cthat dependent    Dwhen it depended   

为什么选B。

3，The purpose of phonetics is _______ an inventory and a description of the sounds found in speech.

A  to provide    B  provided   C  which  provided   D  providing  that  

为什么选A，最后有一个也可以阿

thx!!

hsyeng

1. A選because是conj,缺動詞

2. A to V →不確定性/in order to V 語意不大對  C.that conj 缺動詞 D時態

3. that conj後無動詞 用進行式語意也怪怪的

第二題解釋不大扎實(我會選B)