77.The westerner is used to eating food with ____ while we Chinese use chopsticks.

A.a knife and a fork

B.a knife and fork

C. the knife and fork

D. the knife and the fork

78.Once a bad man comes into ____,the people of that country will suffer a lot.

A.energy B.office C.power D.nation

77.答案是B，

此题考查冠词，a knife and a fork，一把刀和一把叉；a knife and fork，一副刀叉。

78.答案是C，

此题考查短语，come into office,上台执政；还可以说成take office。