1．________ difficult the work was, he would keep on doing it until he finished it.
A．Whenever B．No matter what
C．No matter how D．Wherever
答案与解析：C 句意：不管工作多么艰难，他都继续做下去，直到完成。no matter how“无论怎么样”，相当于however，后接形容词或副词。whenever“无论何时”；no matter what“无论什么”；wherever“无论在哪儿”。
2．________， I have never seen any place as beautiful as Guilin.
A．As I have traveled so much
B．As long as I have traveled
C．Much as I have traveled
D．Now that I have traveled
答案与解析：C 句意：虽然我去过很多地方，但是从没有见过像桂林这么美的地方。as引导让步状语从句时，从句中的状语(much)需提到从句句首。as long as“只要”；now that“既然”。
