问题

Mr. Duncan raised an unnecessary question __________ he then failed to find an answer.

A:to which
B:for which
C:with which
D:by which

正确答案是：

同类题型

What you when I rang you up yesterday

Theteacher together with the students ________ discussing Reading Skills that________ newly published in America

Lucy，could you help me ______ the heavy box to my room—-Sure, a piece of cake.

Why do you eat all the vegetables but leave ____ meat untouched—- I’m on ____ diet.

Haven’t seen you for ages! Where have you been, anywhere? — I _______ to New York CityI just got back