问题

Last term our maths teacher set so difficult anexamination problem ______none of us worked out

A:cut down
B:cutoff
C:cut out
D:cut in

正确答案是：

同类题型

They must have finished the work by the end of last month, ______?

Doctors Without Boarders, ________ international organization, received ________ Nobel Prize for Peace in 1999 for its outstanding work .

－What’sthe time－Oh, Iforgot to have my watch ________.

Many people firmly believed ______ a healthy lifestyle can improve the quality of life

下列加点字词的读音，完全正确的一项是