Daniel，why are you so late? We _______ you would be here an hour ago— SorryI ________ know you were all here

He is wearing sunglasses to __________ his eyes from the strong sunlight.

The ship sailed _____ Xiamen _____ 30miles an hour.

下列各句中加点词语使用恰当的一句是（ ）

I think ______ people drive, ______ air pollution there will be.—That’s true. I hope the air will be fresher soon.