下列各句中画线成语的使用，不正确的一项是（ ）

.On stepping into the room this morning Iwas astonished to find the floor covered with______looked like tinyinsects.

They ________ out the problem, but failed. –What a shame ! I never thought it was going to happen like that.

Didn’t you go to the football club with them that day—- __________. I have no interest in football at all.

is not yet decided.