175.Pirates from Somalia who hijacked ____ European carrier in ____ Indian Ocean threatened to kill its 25 crew members if any rescue operation was attempeted.

A.the;不填

B.a;the

C.the;a

D.an;the

176.In China,____ pressure to pass ___ exams tends to cause students lack of creativity.

A.不填；the

B.a;the

C.the;不填

D.不填；不填

175.答案是B,

考查冠词的用法，第一空泛指一艘欧洲船只；第二空特指印度洋。

176.答案是C，

考查冠词的用法，第一空特指通过考试的压力；第二空泛指多次考试。