I can’t stand (忍受) the air pollution in this city any more. It is getting more terrible.—________. We’ve never had so many factories before.

We always keep_______spare paper, in case we Inn out.[ ]

I don’t know ___________or not.—Neither do I. You may ask his teacher.

Do you know the man ________is wearing a black coat—Yes, he is my uncle.

Can you imagine the difficulty I have ______ the lost child